Hamster eggs used to test human sperm fertility
Sperm Penetration Tests http://www.webmd.com/infertility-and-reproduction/sperm-penetration-tests Sperm penetration tests check to see whether a man’s sperm can move through cervical mucus and the fallopian tubes to join with (fertilize) an egg. This test is usually done when a couple is having trouble becoming pregnant (infertility). There are different sperm penetration tests. The sperm mucus penetration test checks