Fertilitätsausschluß nach Vasektomie
Fragen aus der Praxis
Fertility computing device
Patent 2.642.225
Fertility Control
Update and Trends
Fertility indicator
Patent 4.151.831
Fertility period indicator
Patent 2.769.593
Fertility Regulation and the Public Health
Selected Papers of Christopher Tietze
First World Congress on Fertility and Sterility