Ectopic pregnancies are referred to as

1. pregnancies with genetic abnormality

2. implantation of embryo at site other than uterus

3. implantation of defective embryo in the uterus

4. pregnancies terminated due to the hormonal imbalance

Select the correct option describing gonadotropin activity in a normal pregnant female

1. High level of FSH and LH stimulates the thickening of endometrium

2. High level of FSH and LH facilitate implantation of the embryo

3. High level of HCG stimulates the synthesis of estrogen and progesterone

4. High level of HCG stimulates the thickening of endometrium

A change in the amount of yolk and its distribution in the egg will affect

1. formation of zygote

2. pattern of cleavage

3. number of blastomeres produced

4. fertilization

Which of the following is true regarding sperm?

(1) Fertilizin : For penetrating egg membrane

(2) Hyaluronidase : For penetrating egg membrane

(3) Acrosin : Dissolves corona radiata

(4) Capacitation : Takes place in penis

Assertion :     Cleavage is also called fractionating process.

Reason    :     In cleavage, number of blastomeres increases but size of blastomears decreases.