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

1.	4 – 8 cells	2.	8 – 16 cells
3.	24 – 30 cells	4.	60 – 72 cells

The trophoblast cells of the blastocyst form:

Implantation in humans occurs at the stage of:

During pregnancy the levels of thyroxin:

1. Increase several folds in maternal blood

2. Increases several folds in fetal blood

3. Decreases several folds in maternal blood

4. Decreases several folds in fetal blood

The fetus develops limbs by the end of:

1. One month of pregnancy

2. Two months of pregnancy

3. First trimester of pregnancy

4. Second trimester of pregnancy

The correct sequence of development of embryonic stages in humans is:

The first movements of the fetus and the appearance of hair on the head are usually observed during:

Which of the following is not produced in the woman only during pregnancy?

In human beings, the embryo heart is formed about after ________ of pregnancy.

The signals of fetal ejection reflex originate from:

1. Maternal pituitary

2. Maternal hypothalamus

3. Fully developed fetus and placenta

4. Fetal pituitary