
HealthNovember 1, 1956
Unorthodox Methods of Sperm Transfer
The eggs of some animals are not fertilized by the usual methods, which raises a number of interesting questions. Consider the sponge, the bedbug, the spider and the leech

Unorthodox Methods of Sperm Transfer
The eggs of some animals are not fertilized by the usual methods, which raises a number of interesting questions. Consider the sponge, the bedbug, the spider and the leech