Natural methods for contraception work on the principle of:

1. Preventing fertilization

2. Preventing implantation

3. Preventing ovulation

4. Preventing embryo development

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

Which of the following is the least effective method of birth control?

1. vasectomy

2. rhythm method

3. the pill

4. IUD

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