The menstrual cycle begins with the casting off of

(1) Placenta

(2) Blood

(3) Endometrial lining along with blood vessels

(4) All the three

During parturition, the fetal ejection reflex triggers the release of:

Menstruation is triggered by an abrupt decline in the amount of:

1. Estrogen

2. Progesterone

3. LH

4. FSH

What structure gets implanted on the wall of the uterus during embryonic development?

1.		2.
3.		4.

Which of the structures shown in the following diagram contributes to the source of nutrition for the sperms ejaculated in the semen?

1. A

2. B

3. C

4. D

Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube
2. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
3. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
4. the sperms are transported into vagina just after the release of ovum in fallopian tube

Which of the following events is not associated with ovulation in human female?

1. Decrease in oestradiol

2. Full development of Graafian follicle

3. Release of secondary oocyte

4. LH surge

In human females, meiosis-II is not completed until 

1. Puberty

2. fertilization 

3. Uterine implantation 

4. birth 

Which of the following cells during gametogenesis is normally diploid?

1. Primary polar body

2. Spermatid

3. Spermatogonia

4. Secondary polar body

The main function of mammalian corpus luteum is to produce

1. estrogen only

2. progesterone

3. human chorionic gonadotropin

4. relaxin only