Polliotti, B Current progress in early pregnancy investigation. [electronic resource] - Early pregnancy : biology and medicine : the official journal of the Society for the Investigation of Early Pregnancy Jun 1995 - 148-53 p. digital Publication Type: Journal Article; Review ISSN: 1354-4195 Subjects--Topical Terms: Embryo, Mammalian--physiologyFemaleFetal Diseases--diagnosisHumansPregnancy--physiologyPregnancy Complications--diagnosisPregnancy Trimester, First