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

Differentiate between menarche and menopause.

Write the location and functions of Myometrium and Endometrium.
OR
Explain the functions of myometrium and endometrium in human females.

Identify A, B, C and D with reference to gametogenesis in humans, in the flow chart given below:

List the three hormones produced in women only during pregnancy. What happens to the levels of estrogen and progesterone during pregnancy?

Mention the number of cells in the following stages:

S. No	Embryonic stages	No. of cells
(i)	Zygote	______________
(ii)	Morula	______________
(iii)	Blastocyst	______________

Where does the first cleavage division of zygote take place?

Mention the relationships between pituitary and ovarian hormones during a menstrual cycle.

Differentiate with the help of diagrams only between morula and blastocyst of a human.

Draw the microscopic structure of a human sperm and relate its different parts with their functions.
OR
Draw a labelled diagram of the microscopic structure of a human sperm. Explain the functions of each part.