The drug RU-486 is taken after sexual intercourse. It blocks implantation, and in this sense it prevents pregnancy_.

1. like spermicidal foam

2. in a manner similar to tubal ligation

3. like the familiar birth control pill used for the last 30 years

4 by blocking progesterone receptors in the uterus, thus preventing progesterone from maintaining pregnancy

Birth control pills contain synthetic estrogen and progesterone. How might these hormones prevent pregnancy?

1. They cause the corpus luteum to degenerate.

2. They keep the pituitary from secreting FSH and LH, so ovulation does not occur.

3. They cause the lining of the uterus to be sloughed off.

4 They trigger premature ovulation, before an egg is mature.

Transfer of an ovum collected from a donor into the fallopian tube of another female is called:

1. ZIFT

2. GIFT

3. SUZI

4. ICSI

Vasectomies:

1. Inhibit testosterone production

2. Prevent sperm from entering the semen

3. Inhibit spem production

4. Interfere with male potency

Periodic abstinence is a natural method of contraception where the couples avoid or abstain from coitus during the period of the menstrual cycle when:

1. There is menstrual flow

2. The ovulation is most likely to occur

3. The corpus luteum is most active

4. The proliferative phase begins

Progesterone alone or in combination with estrogen can also be used as contraceptives by females as injections or implants under their skin. When used in this manner, they:

1. do not affect the release of the ovum

2. induce a foreign body reaction leading to rejection of the implanted blastocyst

3. can cause increased risk of ectopic pregnancy

4. have a much longer effective period

Emergency contraception is administering any of the following within 72 hours of unprotected sexual activity except:
1. Combination pill
2. IUD
3. Large amount of prgesterone
4. Large amount of estrogen

Consider the two surgical procedures given below and choose the correct statement:

Match the following sexually transmitted diseases (Column - I) with their causative agent (Column - II) and select the correct option.

      A    B    C   D

(1) (ii) (iii) (iv) (i)

(2) (iii) (iv) (i) (ii)

(3) (iv) (ii) (iii) (i)

(4) (iv) (iii) (ii) (i)

The function of copper ions in copper releasing IUD’s is

(1) they suppress sperm motility and fertilising capacity of sperms

(2) they inhibit gametogenesis

(3) they make uterus unsuitable for implantation

(4) they inhibit ovulation