Low birth weight (LBW) is defined by the World Health Organization as a birth weight of an infant of 2,499 g or less, regardless of gestational age. Infants born with LBW have added health risks which require close management, often in a neonatal intensive care unit (NICU). They are also at increased risk for long-term health conditions which require follow-up over time.
Nutrition and pregnancy refers to the nutrient intake, and dietary planning that is undertaken before, during and after pregnancy. Nutrition of the fetus begins at conception. For this reason, the nutrition of the mother is important from before conception as well as throughout pregnancy and breastfeeding. An ever-increasing number of studies have shown that the nutrition of the mother will have an effect on the child, up to and including the risk for cancer, cardiovascular disease, hypertension and diabetes throughout life.
Neural tube defects (NTDs) are a group of birth defects in which an opening in the spine or cranium remains from early in human development. In the third week of pregnancy called gastrulation, specialized cells on the dorsal side of the embryo begin to change shape and form the neural tube. When the neural tube does not close completely, an NTD develops.
The STROBE(STrengthening the Reporting of OBservational studies in Epidemiology) Statement is a reporting guideline including a checklist of 22 items that are considered essential for good reporting of observational studies. It was published simultaneously in several leading biomedical journals in October and November 2007 and comprises both the checklist and an explanation and elaboration article which gives examples of good reporting and provides authors with more guidance on good reporting. It is also referred to in the Uniform Requirements for Manuscripts Submitted to Biomedical Journals established by the International Committee of Medical Journal Editors and is endorsed by hundreds of biomedical journals.
Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).
David A. Savitz is a professor of Community Health in the Epidemiology Section of the Program in Public Health, Vice President for Research, and Professor of Obstetrics and Gynecology, at The Alpert Medical School of Brown University, and Associate Director for Perinatal Research in The Department of Obstetrics and Gynecology at Women & Infants Hospital, both in Providence, Rhode Island. Savitz is the author of Interpreting epidemiologic evidence: strategies for study design and analysis (ISBN 0-19-510840-X) and more than 275 peer-reviewed articles. He was elected to the Institute of Medicine in 2007.
The Bradford Hill criteria, otherwise known as Hill's criteria for causation, are a group of nine principles that can be useful in establishing epidemiologic evidence of a causal relationship between a presumed cause and an observed effect and have been widely used in public health research. They were established in 1965 by the English epidemiologist Sir Austin Bradford Hill.
Vegan nutrition refers to the nutritional and human health aspects of vegan diets. A well-planned, balanced vegan diet is suitable to meet all recommendations for nutrients in every stage of human life. Vegan diets tend to be higher in dietary fiber, magnesium, folic acid, vitamin C, vitamin E, iron, and phytochemicals; and lower in calories, saturated fat, cholesterol, long-chain omega-3 fatty acids, vitamin D, calcium, zinc, and vitamin B12.
A high-risk pregnancy is one where the mother or the fetus has an increased risk of adverse outcomes compared to uncomplicated pregnancies. No concrete guidelines currently exist for distinguishing “high-risk” pregnancies from “low-risk” pregnancies; however, there are certain studied conditions that have been shown to put the mother or fetus at a higher risk of poor outcomes. These conditions can be classified into three main categories: health problems in the mother that occur before she becomes pregnant, health problems in the mother that occur during pregnancy, and certain health conditions with the fetus.
HIV in pregnancy is the presence of an HIV/AIDS infection in a woman while she is pregnant. There is a risk of HIV transmission from mother to child in three primary situations: pregnancy, childbirth, and while breastfeeding. This topic is important because the risk of viral transmission can be significantly reduced with appropriate medical intervention, and without treatment HIV/AIDS can cause significant illness and death in both the mother and child. This is exemplified by data from The Centers for Disease Control (CDC): In the United States and Puerto Rico between the years of 2014–2017, where prenatal care is generally accessible, there were 10,257 infants in the United States and Puerto Rico who were exposed to a maternal HIV infection in utero who did not become infected and 244 exposed infants who did become infected.
Anemia is a condition in which blood has a lower-than-normal amount of red blood cells or hemoglobin. Anemia in pregnancy is a decrease in the total red blood cells (RBCs) or hemoglobin in the blood during pregnancy. Anemia is an extremely common condition in pregnancy world-wide, conferring a number of health risks to mother and child. While anemia in pregnancy may be pathologic, in normal pregnancies, the increase in RBC mass is smaller than the increase in plasma volume, leading to a mild decrease in hemoglobin concentration referred to as physiologic anemia. Maternal signs and symptoms are usually non-specific, but can include: fatigue, pallor, dyspnea, palpitations, and dizziness. There are numerous well-known maternal consequences of anemia including: maternal cardiovascular strain, reduced physical and mental performance, reduced peripartum blood reserves, increased risk for peripartum blood product transfusion, and increased risk for maternal mortality.
Anna Maria Siega-Riz is an American nutrition, maternal and child health scientist and academic administrator. She is dean of the University of Massachusetts Amherst School of Public Health and Health Sciences. Siega-Riz was previously associate dean for research and the Jeanette Lancaster Alumni Professor of Nursing at University of Virginia School of Nursing.
Emma Fransson is a child psychologist and epidemiologist at Stockholm University and the Karolinska Institute in Sweden. Her expertise is in the health and social implication of shared parenting arrangements on children after their parents are divorced. She has also studied the effects of stress during pregnancy.
Folami Ideraabdullah is an American geneticist and assistant professor in the Department of Genetics and the Department of Nutrition at the Gillings School of Global Public Health at the University of North Carolina at Chapel Hill. Ideraabdullah explores how maternal nutrition and environmental toxin exposure affect development through exploring epigenetic changes to DNA. She has found that maternal Vitamin D deficiencies can cause genome-wide changes in methylation patterns that persist for several generations and impact offspring health. Her international collaboration with the University of Witwatersrand represents the first time that metal levels in the placenta have been investigated in relation to birth outcomes in South Africa.
Germaine M. Buck Louis is the Dean of the George Mason University College of Health and Human Services, a professor in Mason’s Department of Global and Community Health, and a reproductive and perinatal epidemiologist. Prior to her appointment as dean at George Mason in 2017, she was the founding Director for the Division of Intramural Population Health Research at the Eunice Kennedy Shriver National Institute of Child Health and Human Development.
Marian Knight is a British physician who is a Professor of Maternal and Child Population Health at the University of Oxford. She is an Honorary Consultant of Public Health for Public Health England. During the COVID-19 pandemic Knight studied the characteristics and outcomes of pregnant women who tested positive for COVID-19.
Cuilin Zhang is a Chinese-American epidemiologist and physician-scientist researching the roles of genetic and environmental factors in the pathogenesis of gestational diabetes, type 2 diabetes, and obesity and health consequences of these complications. Zhang is a senior investigator and acting chief of the epidemiology branch at the Eunice Kennedy Shriver National Institute of Child Health and Human Development.
Joanne Katz is an epidemiologist, biostatistician, and Professor of International Health at the Johns Hopkins Bloomberg School of Public Health. She holds joint appointments in the Departments of Biostatistics, Epidemiology and Ophthalmology. Her expertise is in maternal, neonatal, and child health. She has contributed to the design, conduct and analysis of data from large community based intervention trials on nutritional and other interventions in Indonesia, Philippines, Bangladesh, Nepal and other countries.
Kathleen Maher Rasmussen is an American nutritionist. She is the Nancy Schlegel Meinig Professor of Maternal and Child Nutrition in the Division of Nutritional Sciences at Cornell University. Rasmussen studies the relationship between maternal nutrition and short- and long-term health outcomes for women and their children.
Elizabeth Mayer-Davis is an American nutritionist who is the Cary C. Boshamer Distinguished Professor at the UNC Gillings School of Global Public Health. She is the Director of the University of North Carolina at Chapel Hill Nutrition Obesity Research Center, and Dean of the UNC Graduate School. She has sought to better understand diabetes. She was awarded the 2019 American Diabetes Association Kelly West Award.
