Obstetric aspects of perinatology.
D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D007226:Infant Mortality; D007883:Legislation, Medical; D008511:Medicine; D008722:Methods; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D012306:Risk; D013038:Specialization; D014481:United States