scientist who is working on a male contraceptive pill, explains diagrams that he has drawn on a chalkboard relating to male hormones: 'this hormone,... - testes diagram stock videos & royalty-free footage00:37Scientist explains male sex hormones using chalkboard, UK; 1971Human Fertility, Testis
in this feminine hygiene instructional film, an illustration demonstrates the male reproductive system. semen is seen heading from the testes into... - testes diagram stock videos & royalty-free footage00:28Diagram of male reproductive system, U.S.A., 1964 Part 2Sperm
in this feminine hygiene instructional film, an illustration of a nude man is shown. followed by the camera zooming in on the man's penis. later, a... - testes diagram stock videos & royalty-free footage00:10Diagram of male reproductive system, U.S.A., 1964 Part 1
scientist from st bartholomew's medical school, who is working on a male contraceptive pill, explains diagrams that he has drawn on a chalkboard... - testes diagram stock videos & royalty-free footage00:36Scientist explains role of pituitary gland in male fertility, UK; 1971