VAN 211: Veterinary Histology and Embryology (2+2)

OVULATION

• The process of release of ovum from the follicles in the ovary is called ovulation.
• On the surface of the ovary the matured graaffian follicles looks like blisters and continues to swell and finally it ruptures at one point of swelling to release the ova along with the corona radiata cells.
• The released ova are picked up by the ciliary movements of the fimbriated end of the oviduct and are carried to the site of fertilization.
• Commonly there is a seasonal period during which ovulation occurs.
• The ovulation occurs during estrus in all domestic animals except cow where it occurs 12 hours after the end of estrus.