Maternal health is often discussed in terms of survival: whether a woman lives through pregnancy and childbirth. While survival is essential, it is no longer an adequate benchmark for progress.
Across the world, and particularly in low and middle-income countries, women are increasingly surviving pregnancy but carrying forward invisible biological burdens that shape the health of their children long after birth.
These burdens do not end at infancy; they extend into adolescence and adulthood, influencing growth, puberty, fertility and long-term disease risk. It is within this critical but often overlooked space that the work of Dr Iyare Omuekpen Cordilia has become both timely and consequential.
Dr Cordilia is a Nigerian medical physiologist whose research sits at the intersection of maternal health and environmental exposure. Trained at the University of Nigeria, Enugu Campus, she specialises in reproductive neurophysiology and the developmental programming of disease, a field that examines how early-life conditions, especially those experienced in the womb, shape health outcomes across the lifespan. Her work challenges conventional public health thinking by shifting attention from short-term pregnancy outcomes to the long-term biological futures of children.
At the heart of her research is a simple but powerful question: what happens to the female reproductive system when pregnancy is complicated by environmental toxins, metabolic disorders or poorly regulated food practices? In seeking answers, Dr Cordilia has produced experimental evidence that everyday exposures, often considered harmless or unavoidable, can silently programme infertility and reproductive dysfunction in later life.
One of her most influential studies focused on the consumption of fruits ripened with commercial-grade calcium carbide during pregnancy. In many parts of Nigeria and other developing countries, calcium carbide is widely used to hasten fruit ripening because it is cheap, fast and readily available.
Yet commercial-grade calcium carbide contains toxic impurities such as arsenic and phosphorus. While arsenic exposure has long been associated with adverse pregnancy outcomes, including miscarriage and stillbirth, little was known about how prenatal exposure affects the reproductive health of surviving offspring.
Using a carefully designed animal model, Dr Cordilia investigated the effects of maternal consumption of calcium carbide–ripened bananas on female offspring.
Her findings were striking. Female offspring exposed prenatally to arsenic-contaminated fruit showed delayed onset of puberty, significant reductions in key reproductive hormones such as follicle-stimulating hormone, luteinising hormone and oestrogen, and markedly reduced fertility rates. At higher exposure levels, structural damage to ovarian follicles was evident, with fewer developing follicles and clear disruption of normal ovarian architecture.
These outcomes are not abstract laboratory observations. Puberty timing, hormonal balance and ovarian development are central determinants of reproductive health. Disruptions in these processes can translate into menstrual irregularities, subfertility, infertility and increased vulnerability to reproductive disorders. By demonstrating that such disruptions can be programmed before birth through common food practices, Cordilia’s research forces a re-examination of how maternal nutrition and environmental safety are understood in public health.
The public health implications are profound. In many communities, women have limited control over how food is sourced, processed or prepared. Pregnant women may unknowingly consume fruits treated with hazardous chemicals, believing they are making healthy dietary choices. Dr Cordilia’s work reveals that the consequences of these exposures are shaped by systemic failures in regulation and enforcement and may manifest many years after birth.
Her earlier work on “Ocimum gratissimum”, commonly known as scent leaf, further illustrates the complexity of maternal health decisions in resource-limited settings. Widely used as a spice and herbal remedy in Nigeria, “Ocimum gratissimum” is often consumed by pregnant women to manage blood sugar levels, control fetal size or ease delivery. While its hypoglycaemic properties have been confirmed in non-pregnant models, its safety in pregnancy had not been adequately investigated.
Her study examined the effects of ethanolic extract of “Ocimum gratissimum” on placental development, birth outcomes and early postnatal growth in diabetic and non-diabetic pregnancies. The results revealed a nuanced picture. The extract significantly reduced placental weight, birth weight and placental-to-birth weight ratios, suggesting a potential protective effect against fetal macrosomia, a common complication of diabetic pregnancy. However, higher doses were associated with fetal resorption, reduced litter size and increased neonatal mortality, particularly in non-diabetic pregnancies.
These findings carry an important public health message. In contexts where access to formal healthcare may be limited, women often rely on traditional remedies perceived as natural and safe.
Dr Cordilia’s work demonstrates that such remedies can have both beneficial and harmful effects, depending on dose, timing and physiological context. Her research does not dismiss traditional practices outright but calls for evidence-based evaluation and clearer guidance to protect maternal and child health.
Beyond the laboratory, Dr Cordilia’s career reflects a deep commitment to education, mentorship and capacity building. She is currently a lecturer in the Department of Physiology at David Umahi Federal University of Health Sciences, Abakaliki, Ebonyi State, where she teaches medical students and contributes to curriculum development. Through lectures, tutorials and practical sessions, she encourages students to think critically about the long-term consequences of prenatal exposures and the broader determinants of health.
Her role as an educator is particularly significant in a health system that often prioritises acute care over prevention. By introducing future doctors to concepts such as developmental programming and endocrine disruption, she is helping to shift medical training towards a more preventive and life-course-oriented approach. This shift is essential if public health systems are to address the root causes of non-communicable and reproductive diseases rather than merely treating their symptoms.
Dr Cordilia has also made substantial contributions to scientific publishing in Nigeria. She served as managing editor of several biomedical journals, including the Nigerian Journal of Experimental and Clinical Biosciences and the Annals of Medical and Health Sciences Research. In these roles, she played a key part in strengthening research quality and visibility, supporting rigorous peer review and improving adherence to ethical standards, while creating platforms for African scientists to share locally relevant research with a global audience.
Her engagement with professional societies further underscores the policy relevance of her work. She is a member of national and international bodies such as the American Physiological Society, The Physiological Society (UK), the International Society for Neurochemistry, the Neuroscience Society of Nigeria and the International Society for the Developmental Origins of Health and Disease. Through these networks, she participates in global conversations on how early-life exposures shape lifelong health, bringing perspectives rooted in African realities to international forums.
In 2025, her research gained increased international attention through presentations at major scientific conferences in Germany and Egypt, supported by competitive travel grants. At these meetings, she highlighted the reproductive risks associated with calcium “carbide–ripened” fruit consumption during pregnancy and explored potential protective strategies against prenatal stress.
These presentations underscored the global relevance of her findings, as many countries face similar challenges with food safety, environmental regulation and maternal health disparities.
At the centre of Cordilia’s work is a clear and ambitious vision: to establish a leading research group dedicated to understanding the neurophysiological and developmental origins of female infertility. Her long-term goal is to unravel how early-life stressors, endocrine disruptors and adverse intrauterine environments alter the “hypothalamic pituitary gonadal axis”, the brain reproductive pathway that governs puberty and fertility. By doing so, she hopes to inform interventions that protect reproductive health before damage becomes irreversible.
This vision aligns closely with emerging global public health priorities. There is growing recognition that many adult diseases, including infertility, metabolic disorders and cardiovascular disease, have roots in early development. Cordilia’s work contributes to this paradigm shift by providing concrete evidence that prenatal exposures common in everyday life can have lasting consequences.
Her research also carries an implicit policy challenge. Weak enforcement of food safety regulations, limited public awareness and inadequate protection for pregnant women create conditions in which preventable harm becomes normalised.
Addressing these gaps requires coordinated action from policymakers, regulatory agencies, healthcare providers and communities. Dr Cordilia’s findings provide a scientific foundation for such action, making a compelling case for stricter regulation of fruit ripening agents, better public education and stronger integration of environmental health into maternal care.
Ultimately, Dr Iyare Omuekpen Cordilia’s work matters because it reveals how maternal exposures shape long-term health outcomes. Her research challenges society to rethink what it means to protect maternal health, emphasising that it is not only about ensuring a safe delivery, but about safeguarding lifelong reproductive health.
In a country where informal food practices, environmental exposures and limited regulation intersect with high maternal health burdens, her science offers both a warning and a roadmap. It calls for a future in which maternal health policy is informed by long term evidence, preventive action and a deeper understanding of how public health truly begins long before birth.
