The study was conducted at a university-based hospital in China, where 1,530 live births were recorded between January 2019 and January 2021. The investigators included women aged 20 to 45 years who had delivered a singleton live infant after a fresh IVF or ICSI embryo transfer. A singleton gestational sac had to be confirmed by ultrasound at five to seven weeks after transfer, and cases involving vanishing twin syndrome were excluded. Pregnancies ending before 28 weeks were not considered live births. Multiple pregnancies, missing lipid results, unavailable complication data and other missing information led to the exclusion of 494 women. The final cohort therefore describes only pregnancies that proceeded to a singleton live birth, not all women who began assisted reproduction, an important selection constraint when interpreting the results.

Blood was collected while participants were fasting on days two to four of the menstrual cycle, before assisted reproductive treatment. The researchers measured total cholesterol, triglycerides, low-density lipoprotein cholesterol and high-density lipoprotein cholesterol, with glucose and reproductive hormones also recorded. A woman was classified as having dyslipidemia if any one of four thresholds was met: high-density lipoprotein cholesterol below 1.0 mmol/L, low-density lipoprotein cholesterol at or above 4.1 mmol/L, total cholesterol at or above 6.2 mmol/L, or triglycerides at or above 2.3 mmol/L. These criteria were validated for a Chinese population. Laboratory assays showed intra-assay coefficients of variation below 1.53% and inter-assay coefficients below 3.55%, providing a measure of the precision of the hormone and metabolic assays.

Among the 1,036 participants, the mean age was 30.8 years and the mean body mass index was 21.7 kg/m². Overall, 180 women met the study definition of dyslipidemia and 856 did not. Women with dyslipidemia had a higher mean body mass index, 23.2 compared with 21.4 kg/m², and slightly higher mean glucose, 5.2 compared with 5.1 mmol/L. They also had higher total cholesterol, low-density lipoprotein cholesterol and triglycerides, together with lower high-density lipoprotein cholesterol. Their infertility diagnoses also differed, and basal follicle-stimulating hormone levels were lower, 5.8 compared with 6.8 IU/L. Because several baseline characteristics were unevenly distributed, the investigators treated the lipid-outcome relationships as exploratory and used multivariable regression to adjust for age, body mass index and glucose.

Across the full cohort, 535 births, or 51.6%, were by cesarean section. The study recorded gestational diabetes in 3.8% of participants, preeclampsia in 0.7%, preterm delivery in 7.6%, small-for-gestational-age infants in 6.8%, large-for-gestational-age infants in 15.6%, low birthweight in 6.4%, macrosomia in 5.7% and neonatal intensive care unit admission in 1.8%. Before statistical adjustment, women with dyslipidemia had higher rates of gestational diabetes, 11.7% versus 2.1%; preterm delivery, 13.9% versus 6.3%; and low birthweight, 10.6% versus 5.5%. The corresponding p-values were below 0.001 for gestational diabetes and preterm delivery and 0.012 for low birthweight. By contrast, the dyslipidemia and comparison groups did not differ significantly in the observed rates of cesarean delivery, preeclampsia, small- or large-for-gestational-age infants, macrosomia or neonatal intensive care admission.

The multivariable analysis included 952 women with complete data and produced the study’s most prominent adjusted associations. For each one-unit increase in triglycerides, the adjusted odds ratio was 1.49, with a 95% confidence interval of 1.11 to 1.99, for preterm delivery. Total cholesterol was associated with gestational diabetes at an adjusted odds ratio of 2.36 per unit, with a 95% confidence interval of 1.74 to 3.21, while triglycerides had an adjusted odds ratio of 1.21 per unit, with a confidence interval of 1.00 to 1.46. For small-for-gestational-age infants, total cholesterol had an adjusted odds ratio of 1.48 per unit, low-density lipoprotein cholesterol 1.48 and high-density lipoprotein cholesterol 3.03; their respective 95% confidence intervals were 1.08 to 2.02, 1.02 to 2.14 and 1.19 to 7.73. These estimates are wide for some outcomes, especially the high-density lipoprotein association, underscoring the uncertainty surrounding their precision.

Not every lipid was related to every outcome, and the unadjusted pattern did not survive adjustment in the same form. Lower high-density lipoprotein cholesterol was initially associated with large-for-gestational-age infants and cesarean delivery, but neither relationship remained clearly significant in the multivariable model. Low birthweight showed borderline adjusted associations with triglycerides, with an odds ratio of 1.22 and a 95% confidence interval of 1.00 to 1.50. No significant adjusted associations were found for cesarean delivery, preeclampsia, large-for-gestational-age infants, macrosomia or neonatal intensive care admission. Preeclampsia was particularly uncommon, occurring in seven women, and the study lacked the statistical power to establish robust relationships for that outcome or for the 19 neonatal intensive care unit admissions. Spearman correlation analysis also linked triglycerides with preterm delivery, low birthweight, gestational diabetes, cesarean delivery and neonatal intensive care admission, but not with small- or large-for-gestational-age infants, macrosomia or preeclampsia.

The investigators proposed several mechanisms that could connect preconception lipid patterns with outcomes, but none was directly tested. Lipids are precursors for steroid hormones such as progesterone, estrogen and androgen, so abnormal circulating lipid levels might influence ovarian steroidogenesis, follicular development and oocyte quality before embryo transfer. A lipid profile may also reflect insulin resistance, altered glucose regulation or impaired endothelial function, all of which could affect placental blood flow and fetal growth. The authors noted that placental dysfunction is a possible contributor to adverse outcomes after assisted reproduction, while reduced placental oxygen delivery is associated with fetal growth restriction and preterm birth. The surprising positive association between high-density lipoprotein cholesterol and small-for-gestational-age birth remains unexplained; the authors suggested that higher high-density lipoprotein might reduce placental cholesterol transfer through low-density lipoprotein uptake, but this was a hypothesis rather than a measured mechanism.

The results are best viewed as hypothesis-generating because the study was retrospective, single-center and restricted to one relatively homogeneous population. The design did not include a prospective sample-size calculation, and multiple statistical comparisons increased the possibility of false-positive findings. Residual confounding cannot be excluded, particularly because the analysis adjusted for only three variables—age, body mass index and glucose—even though the groups differed in other characteristics, including infertility diagnoses and hormone levels. Selection bias is also substantial: the analysis excluded pregnancies that did not result in a live birth and did not represent women who became pregnant naturally, received frozen embryo transfers or delivered multiples. The low frequencies of gestational diabetes and preeclampsia further limited inference. Larger prospective cohorts, with attention to specific infertility diagnoses and interventions that modify lipids, would be needed to determine whether preconception lipid assessment can identify risk reliably or whether improving lipid levels changes pregnancy outcomes. The current data support an association worthy of further testing, not a causal or clinical claim that lipid screening or treatment prevents complications in IVF or ICSI pregnancies.

Subject of Research: Associations between preconception blood lipid levels and pregnancy complications following IVF or ICSI with fresh embryo transfer

Article Title: Association between preconception serum lipid levels and pregnancy complications in singleton live births from IVF/ICSI with fresh embryo transfers

Article References: Cai, W.-Y., Luo, X., Zhang, Q., Li, H., Yang, H., Wang, X., & Xu, J. (2026). Association between preconception serum lipid levels and pregnancy complications in singleton live births from IVF/ICSI with fresh embryo transfers. Frontiers in Nutrition, 13, Article 1915181. https://doi.org/10.3389/fnut.2026.1915181

Image Credits: AI Generated

DOI: 10.3389/fnut.2026.1915181

Keywords: assisted reproduction, preconception health, blood lipids, IVF, ICSI, gestational diabetes, preterm delivery, fetal growth, retrospective study, Association, between, preconception

The research team, led by investigators at the National Research Institute for Family Planning in Beijing and collaborating institutions, categorized preconception fasting plasma glucose (FPG) into four groups: hypoglycemia (below 3.9 mmol/L without a diabetes history), normal (3.9 to below 5.6 mmol/L without a diabetes history), impaired fasting glucose (5.6 to below 7.0 mmol/L without a diabetes history), and diabetes mellitus (7.0 mmol/L or above, or with a diabetes history). Body mass index (BMI) was similarly divided into underweight (below 18.5 kg/m²), normal (18.5 to below 24.0 kg/m²), overweight (24.0 to below 28.0 kg/m²), and obesity (28.0 kg/m² or above). These cutoffs align with standards commonly applied in Chinese and Asian populations.

Of the more than eight million participants, 40.69 percent had at least one abnormality in either preconception FPG or BMI — a strikingly high proportion that underscores how common metabolic deviations are among women of reproductive age even before pregnancy begins. The researchers then tracked seven adverse pregnancy outcomes: medically indicated termination, spontaneous abortion, preterm birth, large for gestational age (LGA), small for gestational age (SGA), birth defects, and perinatal death.

Using robust Poisson regression models adjusted for a range of maternal characteristics, the team found that women who entered pregnancy with both obesity and diabetes mellitus faced the highest relative risks across most outcomes. Compared with women who had normal FPG and normal BMI, those with combined obesity and diabetes had an adjusted risk ratio of 1.49 for medically indicated termination, 1.38 for spontaneous abortion, 1.39 for preterm birth, 1.87 for large for gestational age, and 2.31 for perinatal death. In absolute terms, the excess risks translated to 2.38 percentage points higher risk of preterm birth and 9.08 percentage points higher risk of large for gestational age relative to the reference group.

Interestingly, the pattern reversed for two outcomes. The highest risks of small for gestational age (risk ratio 1.41) and birth defects (risk ratio 2.19) were observed not among women with obesity and diabetes, but among underweight women with diabetes mellitus. This asymmetry hints that different biological mechanisms may underlie fetal growth restriction and congenital anomalies compared with the complications more typically associated with maternal hyperglycemia and excess adiposity.

Beyond simple relative risks, the researchers formally tested for interaction between the two exposures — both on the additive scale (using metrics such as the relative excess risk due to interaction, or RERI) and on the multiplicative scale. They found that positive additive interactions between hyperglycemia and elevated BMI were outcome-specific: they appeared for medically indicated termination, spontaneous abortion, preterm birth, and large for gestational age, but were not observed for small for gestational age, birth defects, or perinatal death. This means that for some complications, the combined effect of having both high blood sugar and high body weight exceeds what would be expected from simply adding the individual risks together.

The team also employed restricted cubic splines to map the dose–response relationship between each exposure and each outcome. These curves revealed a bidirectional amplification: the dose–response relationship of elevated FPG with adverse pregnancy outcomes was steeper among women with higher BMI, while the relationship of elevated BMI with adverse outcomes was similarly more pronounced among women with higher FPG. In contrast, the risk of small for gestational age was predominantly associated with preconception underweight, with much less variation across FPG levels — suggesting that for fetal growth restriction, maternal nutritional status may matter more than glycemic control.

The study’s scale is notable. The National Free Preconception Checkup Project is a government-funded program offering free health examinations to couples planning marriage or conception across all 31 provinces of China. Because the database captures women before they become pregnant, it provides a rare opportunity to examine metabolic status at a truly preconceptional time point, rather than relying on measurements taken during early pregnancy or after complications have already emerged. The researchers conducted multiple sensitivity analyses — excluding women with a history of adverse pregnancy outcomes, restricting to nulliparous women, using region-specific and year-specific meta-analyses, employing imputed datasets, and varying the time interval from preconception examination to conception — and the core findings remained consistent.

The authors caution that the study is observational and retrospective, meaning it can identify associations but cannot prove that modifying preconception FPG or BMI would improve pregnancy outcomes. Residual confounding — for instance, from unmeasured dietary patterns, physical activity, or underlying conditions such as polycystic ovary syndrome — cannot be excluded. The findings are also specific to a Chinese population, and BMI cutoffs differ across ethnic groups, so the absolute risks may not generalize directly to other populations. Nonetheless, the consistency of the joint effects across multiple sensitivity analyses strengthens the plausibility of a genuine interaction.

From a public health standpoint, the results argue for a dual-assessment approach in preconception care: rather than treating elevated blood glucose and elevated body weight as separate risk factors to be flagged independently, clinicians may improve risk stratification by considering both measurements together. The authors suggest that prospective interventional studies are now needed to determine whether actively modifying these factors before conception — through weight management, glycemic optimization, or both — can reduce the burden of adverse pregnancy outcomes among singleton pregnancies. Given that more than 40 percent of women in this enormous cohort had at least one metabolic abnormality before conception, even modest improvements in preconception metabolic health could translate into substantial population-level benefits.

Subject of Research: Joint association of preconception fasting plasma glucose and body mass index with adverse pregnancy outcomes: a retrospective cohort study in China

Article Title: Joint association of preconception fasting plasma glucose and body mass index with adverse pregnancy outcomes: a retrospective cohort study in China

Article References: Wu, H., Yang, Y., Lei, J., Lyu, X., Zhao, C., Li, J., Liu, M., Hu, X., He, Y., Wang, Y., Peng, Z., Zhang, Y., Zhang, H., Wang, Q., Shen, H., Zhang, Y., Yan, D., & Ma, X. (2026). Joint association of preconception fasting plasma glucose and body mass index with adverse pregnancy outcomes: a retrospective cohort study in China. BMC Public Health. https://doi.org/10.1186/s12889-026-29692-0

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29692-0

Keywords: preconception health, fasting plasma glucose, body mass index, pregnancy outcomes, diabetes, obesity, retrospective cohort study, China, Joint, association, preconception, fasting

Neural tube defects, which include spina bifida and anencephaly, arise when the embryonic structure that becomes the brain and spinal cord fails to close properly during the first four weeks of development, often before a woman even realizes she is pregnant. Decades of evidence have established that adequate folic acid intake around the time of conception can prevent a large proportion of these defects, which remain a major preventable cause of congenital disability worldwide. Because the window for protection closes so early, public health authorities recommend that women begin taking a daily folic acid supplement before conception and continue through at least the first trimester. The new research set out to determine whether women of childbearing age in mainland China are translating that general message into precise, correctly timed behavior.

The investigation took a mixed-methods approach conducted between June and September 2024. In the quantitative phase, the researchers administered a study-specific questionnaire online to 5,741 women aged 18 to 49 years recruited from different regions of mainland China through a convenience sample. The survey assessed folic acid-related knowledge and supplementation behaviors, and the team used univariable and multivariable logistic regression analyses to examine the association between knowledge scores and correct supplementation. In the qualitative phase, the researchers conducted semi-structured interviews with 18 pregnant women, guided by the Health Belief Model, a well-established psychological framework that explains health behavior through perceptions of susceptibility, severity, benefits, obstacles, and cues to action. Qualitative data were analyzed using directed content analysis, and the quantitative and qualitative findings were integrated through a joint display to reveal where numbers and lived experience converged or diverged.

The headline numbers from the survey reveal a knowledge pyramid that narrows sharply as it descends from general awareness to actionable detail. Among the 5,741 survey participants, 5,490 women, or 95.6 percent, knew that folic acid prevents neural tube defects. But only 3,594, or 62.6 percent, knew the correct timing for supplementation, and just 2,949, or 51.4 percent, knew the recommended daily dose. In other words, while nearly all women had absorbed the core public health message, roughly half were missing the operational specifics that determine whether supplementation actually protects an embryo during the window of neural tube closure.

Behavioral data told an even more sobering story. Among the 4,470 women with pregnancy or pregnancy-planning experience, 3,858, or 86.3 percent, had obtained folic acid, and 3,708, or 83.0 percent, had actually taken it. Yet only 1,281 women, or 28.7 percent, adhered to the full regimen. The steep drop-off between obtaining the supplement and completing the recommended course indicates that the challenge is not access or initial motivation but sustained, correctly timed adherence. A bottle of folic acid purchased after a positive pregnancy test, or abandoned partway through the preconception period, offers far less protection than one taken daily from before conception onward.

The statistical analysis confirmed that knowledge is not merely correlated with good practice by chance. After adjusting for other variables, the researchers found that knowledge scores were significantly associated with adherence to correct supplementation, with an adjusted odds ratio of 1.493 and a 95 percent confidence interval of 1.43 to 1.56. Each increment in knowledge corresponded to meaningfully higher odds of taking folic acid correctly. This dose-response-like relationship between understanding and behavior strengthens the case that the knowledge gaps in timing and dosage are not benign oversights but active contributors to suboptimal supplementation practices.

The qualitative interviews added psychological texture to these statistics. Using the Health Belief Model as an analytical lens, the researchers identified barriers spanning all five of the framework’s core constructs. Women’s decisions were shaped by how susceptible they perceived themselves to be to having an affected pregnancy, how severe they believed the consequences would be, how beneficial they judged supplementation to be, what obstacles they encountered in obtaining and taking the supplement, and what cues prompted them to act. These perceived factors help explain why a woman who knows that folic acid prevents birth defects in the abstract might still fail to start early, take the right dose, or persist through the recommended duration.

When the quantitative and qualitative strands were integrated through the joint display, a coherent picture of the knowledge-practice gap emerged. The researchers concluded that limited knowledge of the recommended timing and dosage, health information that was insufficiently individualized, and brief counseling from healthcare providers may all contribute to suboptimal supplementation practices. Generic advice delivered in passing during a busy prenatal visit appears inadequate to convey the operational precision that folic acid prevention demands. Women need to hear not just that the vitamin matters, but exactly when to begin, how much to take each day, and how long to continue, with that guidance tailored to their circumstances.

The study, which received no external funding and was approved by the Institutional Review Board of the Peking University Biomedical Ethics Committee, carries clear implications for preconception health education in China and beyond. The authors call for preconception health education that provides specific, individualized, and theory-informed guidance on when, how much, and how long folic acid should be taken. Grounding educational interventions in behavioral frameworks such as the Health Belief Model could help address the perceived barriers that interviews uncovered, while longer and more structured provider counseling could close the timing and dosage knowledge gaps that the survey documented.

For a preventable cause of congenital disability, the distance between 95.6 percent awareness and 28.7 percent full adherence represents an enormous unrealized opportunity. The neural tube closes within the first four weeks of embryonic development, meaning that every month of delayed initiation or interrupted adherence translates into real risk. This research demonstrates that closing the gap requires moving beyond slogans about folic acid’s importance and toward communication that equips women with the concrete, actionable details of the regimen. As the authors’ findings make plain, knowing that a supplement prevents birth defects is only the first step; knowing precisely how to take it is what turns knowledge into protection.

Subject of Research: Folic acid supplementation knowledge and adherence for neural tube defect prevention among women of childbearing age in China

Article Title: Discrepancy between knowledge and practice in folic acid supplementation for NTD prevention: a mixed-methods study of Chinese women

Article References: Li, J., Peng, X., He, H., Liu, N., Dong, W., Lv, D., Li, S., & Zhu, X. (2026). Discrepancy between knowledge and practice in folic acid supplementation for NTD prevention: a mixed-methods study of Chinese women. BMC Public Health. https://doi.org/10.1186/s12889-026-29848-y

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29848-y

Keywords: folic acid, neural tube defects, women of childbearing age, medication adherence, health belief model, mixed-methods research, preconception health, public health, China, nutritional supplements, health education, pregnancy planning

The study’s central innovation lies in its timing. Most previous research on infection and heart defects has focused on infections contracted during pregnancy, particularly in the first trimester when the embryonic heart is forming. This new analysis shifts the window backward, asking whether the state of a woman’s immune system and reproductive tract before she conceives might also shape her child’s cardiac risk. The investigators assessed two broad categories of preconception exposure. The first comprised active reproductive tract infections, specifically candidiasis and Chlamydia trachomatis infection, diagnosed at the preconception examination. The second comprised immunoglobulin G seropositivity to three well-known pathogens: cytomegalovirus, Toxoplasma gondii, and rubella virus. Immunoglobulin G antibodies indicate prior exposure to a pathogen and persist in the blood for years, so seropositivity serves as a marker of a woman’s immunological history rather than of an active acute illness at the time of testing.

The data came from China’s National Free Preconception Health Examination Project, a government program that offers voluntary health screening to couples planning marriage or pregnancy. All participants provided written informed consent, and the retrospective analysis of anonymized records was approved by the Institutional Review Board of Guangdong Women and Children Hospital. Because the screening program covers a defined population rather than a selected sample of hospital patients, the cohort reflects a broad cross-section of women of reproductive age in one of China’s most populous provinces, which strengthens the generalizability of the findings within similar settings.

Statistically, the team used multivariable modified Poisson regression with robust error variance, a modeling approach widely favored in epidemiology when the outcome of interest is relatively common and researchers want to estimate relative risks directly rather than odds ratios, which can overstate risk in such settings. The models adjusted for potential confounding factors, and the authors reported both adjusted relative risks and risk differences per 1,000 births, each accompanied by 95 percent confidence intervals. The primary outcome, congenital heart disease, was ascertained from the birth defects registry, providing a standardized and population-wide mechanism for capturing diagnoses rather than relying on self-report or single-hospital records.

The results were striking across the board. Chlamydia trachomatis infection detected before conception was associated with an adjusted relative risk of 1.89, meaning the risk of congenital heart disease in offspring was nearly doubled among exposed women, with a confidence interval of 1.14 to 3.15. Even more pronounced was the association with cytomegalovirus IgG seropositivity, which carried an adjusted relative risk of 2.70, with a confidence interval of 2.26 to 3.22. Candidiasis was linked to an adjusted relative risk of 1.50, rubella IgG seropositivity to 1.59, and Toxoplasma gondii IgG seropositivity to 1.32, all with confidence intervals excluding the null value of 1. In other words, every one of the five preconception infection-related exposures examined showed a statistically significant association with elevated offspring heart defect risk in the fully adjusted models.

Perhaps the most eye-catching numbers emerged when the researchers examined women exposed to more than one factor. Among women with both Chlamydia trachomatis infection and cytomegalovirus IgG seropositivity, the adjusted relative risk reached 5.14, with a confidence interval of 2.92 to 9.06. Women with candidiasis combined with cytomegalovirus IgG seropositivity showed an adjusted relative risk of 3.72, with a confidence interval of 2.53 to 5.49. These joint-exposure estimates suggest that women carrying multiple infection-related markers before conception may face substantially higher absolute risks than those with any single marker. However, the authors are careful to frame these findings appropriately: the elevated estimates in jointly exposed groups describe joint exposure patterns and should not be interpreted as evidence of biological interaction, meaning the study cannot establish that the two exposures amplify each other’s effects at a mechanistic level.

The biological plausibility of a link between maternal infection and fetal cardiac development has a long scientific pedigree. Congenital heart disease arises from disruptions in the intricate choreography of embryonic heart formation, which occurs largely within the first eight weeks of gestation. Maternal immune activation, whether triggered by active infection or by the lingering immunological landscape left by past pathogens, is thought in some contexts to influence early embryonic environments through inflammatory signaling, altered cytokine profiles, and effects on placental development. Rubella is a classic and well-established teratogen, capable of causing a constellation of congenital defects including cardiac anomalies when infection occurs in early pregnancy. Cytomegalovirus, the most common congenital infection worldwide, and Toxoplasma gondii, a parasite transmitted through undercooked meat or contact with cat feces, are both recognized causes of congenital disease, though their specific contribution to structural heart defects has been less clearly quantified. This study adds a preconception dimension to that picture, suggesting that the immunological terrain established before pregnancy may matter as much as events during gestation.

The methodological strengths of the study deserve emphasis. With more than 630,000 pregnancies and over 1,300 outcome cases, the analysis had the statistical power to detect associations of modest magnitude that smaller studies would miss. The prospective timing of the exposure assessment is another advantage: infection status and serology were measured at preconception examinations, before any pregnancy outcome was known, which reduces the risk of recall bias and reverse causation that plague studies relying on postnatal reporting. The use of a birth defects registry for outcome ascertainment provides systematic case identification across the province. Sensitivity analyses, in which the researchers re-ran their models under alternative assumptions, produced results consistent with the primary findings, adding confidence that the associations are not artifacts of particular modeling choices.

At the same time, the authors and readers alike must weigh the inherent limits of observational research. An association, however robust, does not prove causation. Seropositivity to cytomegalovirus, rubella, and Toxoplasma gondii reflects past exposure and may correlate with unmeasured characteristics, such as socioeconomic conditions, occupational exposures, dietary patterns, or broader immune profiles, that could themselves influence cardiac development risk. The study was conducted in a single province of China, and seroprevalence of these pathogens varies considerably across regions and income settings, so the absolute risks and even the magnitude of associations may differ elsewhere. The authors also note that the published version was shared early as a citable, peer-reviewed accepted manuscript subject to further editorial refinement, a reminder that details may be updated in the final version of record.

Even with those caveats, the public health implications are considerable. Congenital heart disease imposes a lifelong burden on affected children and families, often requiring surgery, ongoing cardiology care, and in severe cases resulting in early mortality. If preconception infection status genuinely contributes to risk, then the period before pregnancy becomes a critical and currently underused window for intervention. Screening and treating chlamydial infections and candidiasis before conception, counseling women on toxoplasmosis prevention, and ensuring rubella immunity through vaccination well ahead of pregnancy are all established, low-cost measures already embedded in many preconception care frameworks. The findings from Guangdong suggest that such measures may carry benefits beyond the infections themselves, potentially reducing the burden of the most common birth defect. For the millions of couples planning pregnancy each year, the message from this research is that the health of the next generation’s heart may begin taking shape long before the first heartbeat.

Subject of Research: Preconception maternal infection-related exposures and the risk of congenital heart disease in offspring

Article Title: Preconception maternal infection-related exposures and risk of congenital heart disease in offspring: evidence from a large population-based cohort in South China

Article References: Chen, Y., Xu, R., Wei, H., Gu, Q., Liu, Y., Zhu, J., Yang, L., Zhang, Y., & Tan, G. (2026). Preconception maternal infection-related exposures and risk of congenital heart disease in offspring: evidence from a large population-based cohort in South China. BMC Public Health. https://doi.org/10.1186/s12889-026-29782-z

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29782-z

Keywords: congenital heart disease, preconception health, Chlamydia trachomatis, cytomegalovirus, rubella, Toxoplasma gondii, candidiasis, IgG seropositivity, population-based cohort, birth defects registry, maternal infection, Guangdong China