A coital technique for promotion of fertility.

In selected cases of subfertile men, the first portion of the split ejaculate is superior to the specimen considered as a whole with regard to sperm density, motility, and cytology, and also in those cases in which there is increased seminal viscosity in the whole ejaculate. Use of the coital technique in which the husband withdraws his penis from the vagina after deposition of the better first portion of the ejaculate during the fertile time of the wife's cycle has resulted in rapidly achieving pregnancy in many instances in which the marriages had been barren for years. A total of 33 cases of pregnancy ascribed to this coital technique in the past four years, with detailed analyses of whole and split ejaculates, is presented.