Formation of primitive streak in the chick embryo is the first sign of

The post-embryonic growth is

Antifertilizin is present on

Prostate gland secretion helps in the formation of

Polar bodies are produced during the formation of

The period of pregnancy is referred as the

The most fundamental characteristics of living being is

During a woman's life time, she produces about

Which of the following is the actual genetic part of a sperm?

Which of the following initiates the preparation of uterus for the implantation of ovum?