Dating of pregnancy: time to forget the last menstrual period.
Gardosi
J
J
D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D008598:Menstruation / Q000502:physiology*; D011247:Pregnancy / Q000502:physiology*; D016216:Ultrasonography, Prenatal / Q000379:methods*