title: Age-dependent losses in the penetrability of mouse eggs.
mesh_terms: D000367:Age Factors; D000818:Animals; D005260:Female; D005306:Fertilization; D066298:In Vitro Techniques; D008297:Male; D051379:Mice; D009865:Oocytes / Q000502:physiology; D010063:Ovum / Q000502:physiology; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology; D015044:Zona Pellucida / Q000502:physiology