Embryo losses during nutritional treatments in animal models: lessons for humans embryo losses and nutrition in Mammals.

ABSTRACT. Extremes in nutrition and aging play important roles in infertility and the health status of the mother and the newborn. Using animal models, it has been shown that follicular population, the quality of the oocyte, and uterine receptivity are sensitive to short- and long-term effects of nutrition, which affect the outcome of natural and artificial reproductive techniques. The establishment of pregnancy that depends on an adequate synchrony between the embryo and the endometrium is altered by over- and undernutrition.