Sperm thrusts and the problem of penetration.
Green
D P
DP
D000818:Animals; D005260:Female; D008297:Male; D010063:Ovum / Q000502:physiology; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology; D015044:Zona Pellucida / Q000502:physiology