Name the stage of the human embryo that gets implanted in the uterus and draw its labeled diagram.

Mention the fate of corpus luteum and its effect on the uterus in absence of fertilisation of the ovum in a human female.

On the basis of the functions mentioned below, identify each one correctly.

1. It helps in the movement of spermatozoan in a fluid medium.
2. It contains hydrolytic enzymes and is used to contact and penetrate the egg during fertilisation.

How is the milk production regulated by hormones in human female? Explain.

Who discovered Sertoli cells? Mention their role in spermatogenesis.

Why is parturition called a neuro-endocrine mechanism? Explain.

Explain the events that follow up to fertilization when the sperms come in contact with the ovum in the fallopian tube of a human female.

Where are fimbriae present in a human female reproductive system? Give their function.

Corpus luteum in pregnancy has a long life. However, if fertilisation does not take place it remains active only for 10 – 12 days. Why?

When and where do chorionic villi appear in humans? State their function.