Question

Egg is liberated from ovary of human in the secondary oocyte stage
A. Secondary oocyte stage
B. Primary oocyte stage
C. Oogonial stage
D. Mature ovum stage.

Answer 1

Ovulation is the release of eggs from the ovaries. The menstrual cycle is considered $28$ days from Day $1$ of bleeding to Day $1$ of the next time of bleeding. The average cycle of a human female is $28$ days.

Complete answer:
Egg is liberated from the ovary of humans in the secondary oocyte stage. Ovulation is defined as the release of eggs from the ovaries. In humans, ovum is released in the secondary oocyte stage from the ovary. To release the oocyte the wall of the ovary gets ruptured. In a human female’s ovulation occurs about $14$ days before the onset of next menstruation. In females, the tertiary follicle changes into the mature follicle (Graafian follicle). The secondary oocyte, present inside the Graafian follicle, forms a new membrane, termed as zona pellucida. The Graafian follicle ruptures for the release of secondary oocyte (ovum) from the ovary by the process, termed as ovulation.

Hence, the correct answer is option A. Secondary oocyte stage.

Additional Information:
Ovulation occurs midway through the menstrual cycle, mainly after the follicular phase. The few days around the ovulation constitute the most fertile phase. The time from the start of the last menstrual period until ovulation is, on average, $14.6$ days, but there is diverse variation among females in this matter.

Note:
Egg is liberated from the ovary of humans in the secondary oocyte stage. The egg release from the ovaries is ovulation. In women, this occurs when the ovarian follicles rupture to release the secondary oocyte ovarian cells. The egg will be available to be fertilized by sperm after ovulation. In addition, the uterine lining called as endometrium is thickened to be able to receive a fertilized egg. The uterine lining as well as the egg will be shed during menstruation, if no conception has occurred.