Researchers in Copenhagen, Denmark conducted a study to determine if an IUD in a normal woman retards endometrial development. 14 Lippes loop users and 14 controls were studied. The device users had h...
The clinical fertility of 1,077 men whose semen had been analyzed between 1950 and 1952, in terms of types of abnormal spermatozoa morphology according to the Hammen system with 14 types, was studied ...