Prenatal Development Quiz

What is the name of the one-celled structure created when a sperm and egg merge?

During which stage does the zygote divide and multiply, going from one cell to two, then four, and so on?

What is the process of cell division called?

When does implantation occur?

What is the name of the layer that eventually forms skin, nails, hair, brain, nervous tissue and cells, nose, sinuses, mouth, anus, tooth enamel, and other tissues?

What is the name of the layer that develops into muscles, bones, heart tissue, lungs, reproductive organs, lymphatic tissue, and other tissues?

What is the name of the layer that forms the lining of the lungs, bladder, digestive tract, tongue, tonsils, and other organs?

During which week does the heart begin to beat?

During which week does the fetus reach approximately 8 cm. (3.2 in.) in length and the head is approximately half the size of the fetus?

During which week does the fetus reach approximately 15 cm. (6 in.) in length?

During which week does the fine hair called lanugo first develops on the head?

During which week does lanugo begin to cover all skin surfaces, and fat begins to develop under the skin?

During which week does the hair grow longer on the head, and the eyebrows and eye lashes finish forming?

During which week does the fetus reach approximately 38 cm. (15 in.) in length and weighs approximately 1.2 kg (2 lb. 11 oz.)?

During which week does the fetus reach approximately 38-43 cm. (15-17 in.) in length and weighs approximately 2 kg (4 lb. 6 oz.)?

During which week does fat deposits become more pronounced under the skin?

During which week do the lungs remain immature but breathing movements begin?

During which week does the fetus reach approximately 41-48 cm. (16-19 in.) in length and weighs 2.6-3.0 kg (5 lb. 12 oz. to 6 lb. 12 oz.)?

During which week are the lungs considered to be full-term?

During which week does the fetus reach 48-53 cm. (19-21 in.) in length?

About 45% of pregnancies result in a miscarriage.

The zygote will die of starvation if it does not receive enough nourishment from the yolk.

Implantation cannot occur if the uterine walls are not prepared in time to receive the zygote

If the zygote becomes attached to a small fibroid tissue in the uterine wall or to the wall of the Fallopian tube, it can get nourishment and will survive.

Unfavorable conditions in the prenatal environment are likely to occur between the tenth and eleventh week after conception.

Maternal malnutrition, vitamin, and glandular deficiencies can cause developmental irregularities.

High blood pressure can increase the risk of preeclampsia in older women.

Exposure to radiation, pollutants, toxic wastes, and harmful substances such as cigarettes and alcohol can negatively impact prenatal development.

Taking harmful drugs such as antibiotics and some nonprescription drugs such as diet pills, aspirin, and coffee can negatively impact prenatal development.

Taking nicotine, caffeine, and illegal drugs such as marijuana, cocaine, and heroin can negatively impact prenatal development.

Rubella (German measles), syphilis, and genital herpes are all diseases that can negatively impact prenatal development.