For normal fertility what percent of the sperm in ejaculate must exhibit normal morphology?

(1) 20

(2) 30

(3) 40

(4) 60

What happens to the majority of the follicles during the phase from birth to puberty?

Which hormone is mainly secreted by the developing follicles during the proliferative phase of the menstrual cycle?

Corpus luteum secretes large amounts of:

Consider the following two statements:
I. Not all copulations lead to fertilization and pregnancy
II. Fertilization can occur if the ovum and the sperms are simultaneously transported to the fallopian tubes.
1. Both I and II are correct and II correctly explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct

Cleavage is:

Morula is a solid ball of cells during early embryonic development and consists of:

The fetal body is covered with fine hair, eyelashes separate, and eyelashes are formed by the end of:

If mammalian ovum fails to get fertilized, which one of the following is unlikely -

1. Estrogen secretion further decreases

2. Progesterone secretion rapidly declines

3. Corpus luteum will disintegrate

4. Primary follicle starts developing

Menstrual bleeding is the result of 

1. low levels of ovarian hormones
2. high levels of ovarian hormones
3. high levels of LH
4. high levels of FSH