Template:Ref-HertigRock1949
From Embryology
Hertig AT. and Rock J. A series of potentially abortive ova recovered from fertile women prior to the first missed menstrual period. (1949) Am. J. Obst. and Gynec. 58: 986-993.
Hertig AT. and Rock J. A series of potentially abortive ova recovered from fertile women prior to the first missed menstrual period. (1949) Am. J. Obst. and Gynec. 58: 986-993.