title: The Tracy Maund Obstetrical Lecture. The beginning of life.
mesh_terms: D000177:Acrosome / Q000502:physiology; D004624:Embryo Transfer; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro / Q000379:methods; D006801:Humans; D007231:Infant, Newborn; D007247:Infertility, Female / Q000175:diagnosis; D008297:Male; D011247:Pregnancy; D013075:Sperm Capacitation; D013084:Sperm-Ovum Interactions; D015044:Zona Pellucida / Q000276:immunology