The study, led by Emily A. Clarke of the Icahn School of Medicine at Mount Sinai and Reproductive Medicine Associates of New York, together with colleagues including Alan B. Copperman, examined 203 patients who experienced early pregnancy loss and subsequently underwent a single euploid embryo transfer, a procedure in which a genetically screened embryo with the correct number of chromosomes is transferred one at a time. Of these patients, 88 were managed medically, typically with misoprostol, while 115 underwent surgical management, usually dilation and curettage. Because all participants received embryos confirmed to be chromosomally normal through preimplantation genetic testing, the researchers were able to isolate the contribution of the uterine environment itself, removing the confounding noise of embryo aneuploidy, which is the leading cause of early miscarriage and failed implantation.

The primary outcome was the change in endometrial thickness between the cycle in which the pregnancy was lost and the subsequent frozen embryo transfer cycle. Endometrial thickness, measured by transvaginal ultrasound, is one of the most closely watched parameters in reproductive medicine because a lining thinner than seven millimeters is associated with markedly reduced implantation and live birth rates. Large analyses of tens of thousands of embryo transfers, including a 2022 study of more than 96,000 autologous transfers published in Fertility and Sterility, have demonstrated a graded relationship between lining thickness and success, making any iatrogenic thinning of the endometrium a legitimate clinical concern.

What the researchers found was striking in its neutrality. Between the initial and subsequent transfer cycles, endometrial thickness changed by an average of plus 0.3 millimeters in the medically managed group and plus 0.1 millimeters in the surgically managed group, a difference that was statistically indistinguishable with a P value of 0.65. In the subsequent transfer cycle itself, the average lining measured 9.4 millimeters in the medical group and 9.1 millimeters in the surgical group, again with no significant difference. Cycle cancellation because of a persistently thin lining, defined as less than seven millimeters, was rare in both arms, occurring in 3.4 percent of medically managed patients and 2.6 percent of surgically managed patients. In practical terms, the surgical instrumentation that many feared might scar the uterine cavity did not measurably impair the endometrium’s ability to proliferate under hormonal preparation.

This finding carries particular weight because prior literature had raised genuine alarms. Earlier studies, including work by Shufaro and colleagues in 2008 and investigations by Davar and Azumaguchi, described a thin, unresponsive endometrium as a possible complication of surgical curettage, with some patients developing linings that failed to thicken even with high doses of estrogen. Asherman’s syndrome, the formation of intrauterine adhesions after aggressive curettage, remains a recognized and sometimes devastating consequence of uterine instrumentation. The new data do not erase those risks, which are uncommon but real, yet they suggest that in the specific population of IVF patients destined for euploid embryo transfer, routine dilation and curettage for early pregnancy loss does not produce a detectable average penalty on endometrial development.

The secondary outcomes told a more nuanced story. While live birth rates in the subsequent transfer cycle were statistically similar between the two groups, 48.8 percent among medically managed patients versus 40.7 percent among surgically managed patients, the rate of clinical pregnancy loss after a positive pregnancy test was significantly higher in the surgical cohort, at 15.7 percent compared with 4.9 percent. After adjusting for potential confounders, surgical management carried an adjusted odds ratio of 3.72 for subsequent pregnancy loss, with a 95 percent confidence interval of 1.11 to 12.47. The authors stopped short of claiming causation, and the absolute difference, roughly eleven percentage points, is modest, but the signal is biologically plausible. Instrumentation of the uterine cavity could theoretically alter the endometrium’s receptivity at a level finer than thickness alone can capture, affecting the molecular dialogue between embryo and lining that governs implantation and placentation.

Endometrial receptivity is a complex process involving the synchronized expression of hundreds of genes, the maturation of the epithelial pinopodes, the recruitment of immune cells, and the development of an adequate blood supply. Research into implantation failure has implicated inflammatory markers and disruptions of this delicate immunological environment. A curettage procedure induces a controlled injury and an inflammatory repair response, and while the lining may regenerate to a normal thickness, subtle alterations in its functional quality could persist. The elevated miscarriage rate observed in the surgical group, despite equivalent lining measurements and equivalent live birth rates among those pregnancies that did progress, hints at exactly this kind of subclinical functional difference, one that ultrasound cannot see but that may manifest as an early pregnancy that implants and then fails.

The study’s design deserves scrutiny. As a single-center retrospective cohort, it cannot randomize patients to treatment arms, and the choice between medical and surgical management was made by patients and physicians based on clinical circumstances, introducing the possibility of selection bias. Patients with heavier bleeding, retained tissue, or hemodynamic instability are more likely to undergo surgery, and these same factors might independently affect subsequent reproductive outcomes. The sample size of 203, while respectable for a single-center study, limits statistical power for rare outcomes, and the wide confidence interval around the miscarriage odds ratio reflects that uncertainty. Nevertheless, the use of euploid single embryo transfers represents a methodological strength that few prior studies on this question have enjoyed, because it controls for the single largest determinant of IVF success, namely embryo chromosomal competence.

For clinicians, the findings translate into a more evidence-based framework for counseling. Patients with early pregnancy loss who have frozen euploid embryos waiting can be told that neither medical nor surgical management appears to compromise their endometrial thickness or their overall chances of a live birth in the next transfer cycle. Those who prefer the certainty and speed of a surgical procedure, or who require it for clinical reasons, can be reassured that the lining typically recovers fully. At the same time, the elevated loss rate in the surgical group gives clinicians a legitimate data point to discuss, particularly for patients with a history of recurrent pregnancy loss who may be especially sensitive to any factor that raises miscarriage risk. The decision should remain individualized, weighing the efficacy, side effects, and completion rates of misoprostol against the operating room requirements of curettage.

The research, presented orally at the American Society for Reproductive Medicine’s scientific congress in Denver in October 2024 before its peer-reviewed publication, adds to a growing body of work aimed at demystifying what happens to the uterus after miscarriage and how best to prepare it for the next attempt. Early pregnancy loss affects roughly one in ten recognized pregnancies, and among IVF patients the emotional and financial stakes of each subsequent cycle are exceptionally high. By demonstrating that endometrial recovery is robust across both management pathways, and by flagging a modest but significant difference in subsequent pregnancy loss, the study gives patients and physicians something they have long lacked: quantitative, embryo-quality-controlled evidence on which to base one of the most common and consequential decisions in reproductive medicine. The authors note that de-identified data are available upon reasonable request, and they emphasize that these findings may help guide counseling for patients navigating the difficult intersection of miscarriage management and fertility treatment.

Subject of Research: How medical versus surgical management of early pregnancy loss affects endometrial thickness and outcomes of subsequent euploid embryo transfers in IVF patients

Article Title: Management of Early Pregnancy Loss: Reproductive Outcome in Subsequent Euploid Embryo Transfers

Article References: Management of Early Pregnancy Loss: Reproductive Outcome in Subsequent Euploid Embryo Transfers. (n.d.). https://doi.org/10.1007/s43032-026-02200-w

Image Credits: AI Generated

DOI: 10.1007/s43032-026-02200-w

Keywords: early pregnancy loss, dilation and curettage, misoprostol, endometrial thickness, euploid embryo transfer, in vitro fertilization, live birth rate, clinical pregnancy loss, reproductive medicine, miscarriage management, Management, Early

The distinction between macronutrients and micronutrients is central to understanding how soil condition translates into human nutrition. Macronutrients such as nitrogen, phosphorus, potassium, calcium, and magnesium are required in relatively large amounts and are the traditional focus of fertilizer programs. Micronutrients, by contrast, are needed in trace quantities but perform indispensable roles in human physiology. The source evidence identifies seventeen micronutrients relevant to human health, including iron, zinc, iodine, selenium, copper, molybdenum, manganese, and fluoride. Deficiencies of iron and iodine alone can produce anemia, impaired cognitive development, and thyroid disorders, conditions that remain widespread in regions where soils are degraded and diets lack diversity. Because plants acquire these elements from the soil solution, the nutritional quality of food is ultimately a reflection of what the soil can supply.

This pathway helps explain why malnutrition, understood as a deficiency of essential nutrients even when calories are sufficient, may be a larger global problem than undernutrition in terms of the vulnerable population affected. A field can produce abundant cereal grain on a degraded soil, yet that grain may carry lower concentrations of zinc or iron than grain grown on a healthier counterpart. The result is a paradox in which food availability improves while nutritional adequacy stagnates or declines. Addressing this paradox requires attention to the soil processes that govern micronutrient availability, including pH regulation, organic matter dynamics, and the activity of mycorrhizal fungi and other soil organisms that mobilize otherwise inaccessible elements.

The soil microbiome adds another dimension to this nexus. Healthy soils with robust organic matter content host diverse microbial communities that suppress soil-borne pathogens and can reduce the incidence of mycotoxins produced by fungal contaminants. Reduced disease pressure means fewer fungicide and insecticide applications, which in turn lowers pesticide residues in harvested food. There is also emerging interest in the possibility that the soil microbiome influences the human gut microbiome through the food chain, since the microbial and biochemical profile of produce reflects the environment in which it was grown. While this area of research is still developing, it reinforces the One Health premise that the health of soil, plants, and people is indivisible rather than merely analogous.

Clay mineralogy offers a concrete example of how inherent soil properties shape management options. Soils dominated by 1:1 clays, such as kaolinite, have low cation exchange capacity and limited capacity to hold nutrients, whereas 2:1 clays such as smectites have high charge density and large surface areas. Swelling and shrinking behavior in 2:1 clays affects aggregation, aeration, and root penetrability, while low-activity clays in many tropical soils leave smallholder farmers with little inherent nutrient reserve. The evidence notes that low nutrient reserves resulting from low charge density and low external inputs are a primary cause of low yields among resource-poor farmers in the global south. Any strategy for improving crop health in these regions must therefore combine organic and mineral inputs in ways that compensate for inherent mineralogical constraints.

Water dynamics are inseparable from these considerations. The capacity of a soil to hold plant-available water, sometimes described as green water stored in the root zone, determines how crops weather dry periods between rainfall events. Organic matter improves this capacity, as does good aggregation and minimal compaction. Conversely, degraded soils shed water rapidly as runoff, exposing crops to both drought stress during dry spells and inundation during intense storms. The coupled cycling of carbon, nitrogen, water, phosphorus, and sulfur must remain in balance; perturbing one cycle through land misuse inevitably disturbs the others, with consequences for nutrient leaching, greenhouse gas emissions, and water quality downstream.

The four components of soil health identified in the evidence, namely physical, chemical, biological, and ecological, provide a useful framework for diagnosis. Physical health encompasses structure, aggregation, porosity, and resistance to erosion by water and wind. Chemical health covers nutrient reserves, exchange capacity, and the absence of toxicities. Biological health reflects the abundance and diversity of organisms ranging from bacteria and fungi to earthworms. Ecological health describes how these elements function together to deliver ecosystem services. Because most of these components respond to soil organic matter, management practices that build organic matter tend to improve all four dimensions simultaneously, which is why organic matter is often treated as a master indicator of soil condition.

Regenerative agriculture and agroecological principles offer practical routes to this goal. Practices such as cover cropping, diversified rotations, reduced or no tillage, integration of livestock, mulching with crop residues, and agroforestry all contribute biomass carbon to the soil while protecting it from erosion. Leguminous cover crops add biologically fixed nitrogen, reducing dependence on synthetic fertilizers whose production and overuse carry environmental costs. Diverse rotations break pest and disease cycles, lowering pesticide requirements. These practices align with the four components of crop health proposed by Vega and colleagues, namely usefulness, adversities, safety, and autonomy, since they enhance productive usefulness while reducing adversities, improving safety, and increasing farmer autonomy from costly external inputs.

The salutogenic orientation embedded in this framework is worth emphasizing. Rather than defining crop health merely as the absence of pests or deficiencies, a salutogenic perspective asks what factors actively generate and sustain health. Meaningfulness, comprehensiveness, and manageability, borrowed from models of human wellbeing, translate into farming systems that farmers understand, can manage with available resources, and find worthwhile. This has implications for extension and policy: recommendations that ignore farmers’ economic realities and knowledge systems are unlikely to improve crop health at scale, no matter how sound the underlying agronomy.

Policy instruments also have a role. The evidence argues that soil health legislation at state, national, continental, and international levels should explicitly address crop health management and the research and outreach needed to advance it. Such policies should be pro-nature, pro-agriculture, and pro-farmer simultaneously, recognizing that these objectives are complementary rather than competing. Where farmers are compensated for building soil carbon, restoring biodiversity, or improving water quality, the private incentives of individual land managers align with the public benefits of ecosystem services. Conversely, policies that reward yield alone can encourage practices that mine soil fertility and externalize environmental costs.

The regional dimensions of the challenge deserve attention. Sub-Saharan Africa, South Asia, and Latin America carry a disproportionate burden of undernutrition, malnutrition, and soil degradation, and they are also regions where smallholder farming dominates. In these settings, even modest improvements in soil organic matter and nutrient supply can produce meaningful gains in yield stability and nutritional quality. Because smallholders often lack access to irrigation and purchased inputs, practices that rely on locally generated biomass and biological nitrogen fixation are particularly appropriate. At the same time, these regions face intensifying pressure from climate change, which raises the value of soil-based water buffering and carbon sequestration as adaptation and mitigation strategies.

Food safety completes the picture. Crops grown in clean environments with minimal agrochemical residues protect consumers from chronic exposure to harmful compounds, while suppression of pathogens and mycotoxins in healthy soils reduces acute risks. Safe, nutritious food supports not only physical health but also mental health and overall wellbeing, according to the evidence reviewed. The quality of the surrounding environment, including water, air, microclimate, and above- and below-ground biodiversity, is improved in parallel, so the benefits of crop health management extend well beyond the field boundary.

Taken together, these threads support a coherent conclusion: crop health is not a narrow agronomic metric but a nexus concept linking soil processes, food composition, environmental quality, and human wellbeing. Managing it well requires treating the soil as a living system whose physical, chemical, biological, and ecological functions can be built up or squandered through everyday decisions. It requires policies that recognize farmers as stewards of ecosystem services, research programs that integrate soil science with human nutrition, and farming systems grounded in ecological principles. The slogan that healthy soils produce healthy crops and healthy people is more than rhetoric; it summarizes a causal chain that science is increasingly able to trace, and that agricultural policy would do well to follow.

Subject of Research: Crop health management for food and nutritional security and soil health

Article Title: Crop health management for food and nutritional security and soil health

Article References: Lal, R. (2026). Crop health management for food and nutritional security and soil health. Crop Health, 4(1), Article 22. https://doi.org/10.1007/s44297-026-00083-6

Image Credits: AI Generated

DOI: 10.1007/s44297-026-00083-6

Keywords: Crop, health, management, food, nutritional, security, soil, scientific research

The case for a more precise approach begins with taxonomy. The Spanish Catalogue of Invasive Alien Species uses O. maxima as its regulatory category, but names found in historical, agricultural and ecological sources do not always refer to the same biological entity. Current taxonomic treatments recognize O. maxima as an accepted species and list names such as Opuntia amyclaea and O. ficus-indica var. amyclaea among its synonyms. Other studies discuss Opuntia dillenii, a name that Plants of the World Online treats as a synonym of Opuntia tuna. These distinctions matter because invasive potential, biological-control responses, ecological interactions and agricultural uses can vary among taxa. A label applied to a group of plants may therefore combine populations with different histories and behaviors. The authors emphasize that species-level identification is particularly important before evidence from one cactus is used to justify control of another. Without that clarification, a single regulatory category can obscure the biological differences that management is supposed to address.

Demographic records further complicate the idea that Spanish Opuntia populations have followed a simple pattern of unchecked expansion. Government agricultural statistics estimated that slightly more than three million bushes recorded as O. maxima grew outside farmland in Spanish territories in 1961. About 1.5 million were in the Canary Islands, while mainland populations included approximately 797,000 in Andalusia and 453,500 in Murcia. By 2011, the total had fallen by nearly 95 percent, to 169,588 bushes, with most remaining in the Canary Islands. In 2019, the records listed 101,445 in the Canary Islands but only about 320 on the mainland—310 in Andalusia and 10 in Murcia. The decline became especially steep after the arrival of the cochineal insect Dactylopius opuntiae in 2007. Estimates in the preceding decade had generally ranged between 200,000 and 300,000 bushes, then dropped below historical levels. These figures do not by themselves measure ecological impact, but they challenge a narrative of uniform demographic expansion and show why current abundance, recent decline and historical distribution all need to be considered.

Population size, however, cannot settle the invasion question. A species may decline overall while still causing serious damage in particular habitats, just as a plant that is harmful in one location may provide resources or structure in another. The Perspective reviews evidence from Spanish islands and mainland sites showing that some Opuntia taxa have become embedded in local ecological networks. Studies of pollination in Tenerife and Menorca found that alien plants, including Opuntia, did not simply displace native plants from pollinator interactions; in some circumstances, they reinforced existing connections between plants and pollinators. Research on seed dispersal likewise found complex interactions involving native and alien animals. These findings do not make the cacti harmless. They show instead that removing them can alter relationships that have developed in transformed landscapes. In Tabarca, removing Opuntia was associated with detrimental effects on local arthropods. On Benidorm, eliminating the plants during an effort to restore native vegetation had unforeseen negative effects on yellow-legged gull colonies. Such examples suggest that eradication should be evaluated as an ecological intervention, not treated as an automatic synonym for restoration.

Other evidence points in the opposite direction and underscores the need for targeted control. The Spanish catalogue reports O. maxima invading stands of Pinus pinea and scrub dominated by Pistacia lentiscus near Doñana, where competition with native vegetation may be a serious concern. In the Canary Islands, research on the lizard Gallotia galloti found that it consumes seeds from both native and alien plants, including O. dillenii. The seeds of Opuntia retained germination potential after passing through the lizard’s gut, while seeds of a plant identified as Scilla cf. haemorrhoidalis, endemic to the islands, were negatively affected. Because the lizard fed according to availability, these interactions could favor some Opuntia taxa while reducing the frequency of vulnerable native plants. The authors therefore reject both extremes: neither alien status alone nor cultural familiarity can establish whether a population should remain. Control is most clearly justified where effects on native or endemic communities are demonstrated or strongly plausible. In those cases, removal should be coupled with restoration capable of replacing lost habitat structure and supporting native communities.

The cactus’s social history makes that balance unusually complicated. European colonizers introduced Opuntia to the Iberian Peninsula during the 1500s, probably first as an ornamental plant. In arid regions, people later cultivated it extensively for fruit, fodder and property boundaries. The plant also supported production of cochineal, a scale insect whose carmine pigment was once an important commercial red dye. In the Canary Islands—especially Tenerife, Lanzarote and Gran Canaria—cultivation expanded for dye production, but high labor costs, synthetic dyes and the shift toward tourism and services reduced its economic importance. On mainland Spain, particularly in Andalusia and Murcia, the fruits known as “chumbos” remained part of local diets. The decline of the bushes after 2007 has consequently been experienced not only as an ecological change but as a loss of food traditions, rural income, landscape identity and local memory. Reports from southern communities have linked the disappearance of chumberas with concern about lost livelihoods and, in some places, increased vulnerability to landslides. These accounts do not override conservation priorities, but they demonstrate that management decisions have consequences beyond species lists and maps.

Aridification raises the stakes because the cactus is now being evaluated in landscapes where water scarcity is reshaping agriculture and restoration. Models place much of the plant’s potential distribution in coastal and peri-coastal areas, where mild climates overlap with dense settlement, tourism, infrastructure, irrigated farming and intense water demand. In places such as La Axarquía, southern Spain’s expanding irrigated agriculture has contributed to severe water stress, creating pressure to reconsider land uses that depend less heavily on irrigation. The authors suggest that carefully identified and managed Opuntia could, in suitable settings, contribute to a more diversified dryland economy. Its fruits have food value, its pads can serve as fodder, and its drought tolerance may support production where water-intensive crops are becoming harder to sustain. Prickly pear stands have also been associated in other Mediterranean research with soil protection and the natural regeneration of woody plants in areas at risk of desertification. These potential benefits remain conditional: a cactus that helps stabilize degraded land in one setting could threaten an endemic community in another. Climate adaptation therefore requires site-specific evidence, not a general presumption that drought tolerance makes any introduced population desirable.

The proposed alternative is a nature-positive management system that treats risk and value as variables to be measured at population level. Authorities would first clarify taxonomic identity, then assess ecological interactions, habitat sensitivity, landscape history and realistic restoration goals. Where native or endemic species are threatened, intervention could include control or eradication, followed by restoration rather than simple removal. In degraded, arid or historically transformed landscapes where ecological risk is low or manageable, containment, tolerance or carefully regulated use could be considered instead of blanket eradication. This framework also asks managers to account for food security, rural livelihoods, local knowledge, cultural value and the relationship between production and water demand. Revived cultivation might support low-water agriculture or niche markets, while cochineal production could benefit from renewed interest in natural dyes and improved extraction methods. None of these possibilities is presented as a guaranteed solution, and the Perspective does not report a new experiment, systematic review or taxonomic revision. It is a synthesis intended to improve decisions. Its broader warning is that conservation baselines are shifting: as climate change and land-use transformation make some historical ecosystems increasingly difficult to restore, effective policy may need to protect biodiversity while acknowledging the ecological functions and human meanings that long-established alien populations can acquire.

The authors also caution that the sharp demographic decline should not be interpreted as evidence that ecological questions have disappeared. The spread of Dactylopius opuntiae changed the abundance of plants recorded under the O. maxima category, but it does not resolve whether surviving populations belong to the same taxa or whether their effects are benign across all habitats. Biological control can therefore alter the visibility and distribution of a population without eliminating the need for ecological assessment. Monitoring should track recruitment, vegetative spread, interactions with native species and changes in habitat condition, rather than relying only on counts of established bushes.

This approach also places restoration objectives at the center of management. Removing a long-established cactus may be appropriate where it threatens endemic flora or sensitive communities, but removal alone does not recreate the former ecological state. Decisions should specify what habitat or function is intended to replace the population, how success will be measured and whether restoration is feasible under increasing aridity and water scarcity. By linking these choices to the Sustainable Development Goals, the Perspective frames invasive-species policy as a coordination problem involving biodiversity, land degradation, water use and rural well-being. Its emphasis on transparent evidence and site-level evaluation is intended to make regulation more proportionate without weakening protection where risks are substantial.

Subject of Research: Context-dependent management of naturalized Opuntia populations in Spain under aridification

Article Title: Rebalancing the management of naturalized Opuntia in Spanish territories under aridification: taxonomy, invasion status, cultural value, and climate adaptation

Article References: Perea-García, J. O., & Medina-Lorenzo, E. (2026). Rebalancing the management of naturalized Opuntia in Spanish territories under aridification: taxonomy, invasion status, cultural value, and climate adaptation. Discover Ecology, 2(1), Article 20. https://doi.org/10.1007/s44396-026-00039-8

Image Credits: AI Generated

DOI: 10.1007/s44396-026-00039-8

Keywords: Opuntia, Spain, invasive species, taxonomic uncertainty, aridification, water scarcity, restoration ecology, climate adaptation, Rebalancing, management, naturalized, Spanish