title: Optimal sperm concentration and minimal number of spermatozoa for fertilization in vitro of rat eggs.
mesh_terms: D000367:Age Factors; D000818:Animals; D002452:Cell Count; D005260:Female; D005306:Fertilization; D066298:In Vitro Techniques; D008297:Male; D010060:Ovulation; D051381:Rats; D013094:Spermatozoa / Q000166:cytology*