Drugs that cause malformation in developing embryos during pregnancy are called:
1. Teratogen
2. Nicotine
3. Tranquilizers
4. Alcoholic beverages

Extrusion of the second polar body from the egg nucleus occurs:

1. simultaneously with the first cleavage

2. after entry of sperm but before fertilization

3. after fertilization

4. before entry of sperm into the ovum

Select the correct sequence for the transport of sperm cells in the male reproductive system:

The extra embryonic membranes of the mammalian embryo are derived from

1. Trophoblast

2. Inner cell mass

3. Formative cells

4. Follicle cells

In the 28 day human ovarian cycle, the duration of luteal phase is approximate?

1. 14 days

2. 28 days

3. 30 days

4. 5 days

In the fertile human female, approximately on which day of the menstrual cycle (32 days) does ovulation take place?

1. Day 18

2. Day 14

3. Day 1

4. Day 8

Which of the following groups of hormones produced in women only during pregnancy ?

1. hCG, hPL, relaxin

2. Estrogen, progesterone, hCG

3. Cortisol, prolactin, thyroxine

4. Prolactin. progesterone, hCG

Which one of the following statements is incorrect about menstrual cycle ?

1. The first menstruation begins at puberty and is called menarche

2. Lack of menstruation may also occur due to some environmental factors like stress, poor health

3. Corpus luteum secretes large amounts of progesterone which is essential for maintenance of endometrium

4. In absence of fertilisation, corpus luteum degenerates in luteal phase and new follicles start developing immediately

Phase of menstrual cycle in human that lasts for 7-8 days is

1. Follicular phase

2. Ovulatory phase

3. Luteal phase

4. Menstruation