Alexander, H [How high are the "normal" early embryonic losses, that is, preclinical and clinical abortions?]. [electronic resource] - Zentralblatt fur Gynakologie 1988 - 1468-9 p. digital Publication Type: Letter ISSN: 0044-4197 Subjects--Topical Terms: Abortion, Spontaneous--epidemiologyEmbryo Loss--epidemiologyFemaleFertilityFetal Death--epidemiologyHumansPregnancy