Round table discussion on research design, statistical aspects and data collection.
D000886:Anthropometry; D001942:Breast Feeding; D003625:Data Collection / Q000706:statistics & numerical data*; D005260:Female; D005298:Fertility; D006801:Humans; D008597:Menstrual Cycle; D015233:Models, Statistical; D010060:Ovulation; D049590:Postpartum Period; D014944:World Health Organization