Natural methods for contraception work on the principle of:

1. Preventing fertilization

2. Preventing implantation

3. Preventing ovulation

4. Preventing embryo development

Lactational amenorrhea is effective up to maximum period of:

1. 3 months

2. 6 months

3. 9 months

4. 12 months

The ideal contraceptive for females who want to delay pregnancy and/or space children is:

1 Barrier contraceptive

2. Periodic abstinence

3. IUD

4. Hormonal pills

Emergency contraceptive methods must be employed within:

1. 72 hours of ovulation

2. 72 hours of onset of menstrual flow

3. 72 hours of unprotected coitus

4. 72 hours of cessation of menstrual flow

Identify the incorrect statement regarding surgical birth control methods:

ART [used to help infertile couples] stands for:

1. Assisted Reproductive Technologies

2. Artificial Reproductive Technologies

3. Augmented Reproductive Technologies

4. Anomalous Reproductive Technologies

In 'test-tube baby' procedure:

1. Fertilization is in-vitro but embryo development is in-vivo

2. Fertilization is in-vivo but embryo development is in-vitro

3. Both fertilization and embryo development are in-vitro

4. Both fertilization and embryo development are in-vivo

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.

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