Certain dates may not provide a reliable estimate of gestational age.
Geirsson
R T
RT
Department of Obstetrics and Gynaecology, University of Edinburgh.
Busby-Earle
R M
RM
D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D008598:Menstruation; D011247:Pregnancy; D016216:Ultrasonography, Prenatal