FERTILIZATION
SPERM DEPOSITED IN VAGINA AT EJACULATION
TRAVEL TO OVIDUCT TAKES A LITTLE OVER 1/2 HOUR
CERVICAL CANAL IS OPEN DUE TO ESTROGEN BEING HIGH AND REMAINS OPEN TWO TO THREE DAYS
SPERM ENTER UTERUS AND ARE CHURNED AROUND
WHEN REACH OVIDUCT, SMOOTH MUSCLE CONTRACTIONS PROPELL THEM ONWARD
MATURE EGG RELEASES A CHEMOTACTIC AGENT
OUT OF SEVERAL HUNDRED MILLION ONLY A FEW THOUSAND MAKE IT
TAIL OF SPERM MANEUVERS IT FOR FINAL PENETRATION