[Why are there so many sperm in the ejaculate?].
D000818:Animals; D006224:Cricetinae; D005260:Female; D005306:Fertilization; D006801:Humans; D008297:Male; D009893:Opossums; D011247:Pregnancy; D013076:Sperm Count; D013083:Sperm Transport
Proc je tolik spermií v ejakulátu?