 |
1 |  |  The three periods of prenatal development include the period of the , the embryonic period, and the fetal period. |
 |
 |
2 |  |  After three months, the fetus is approximately inches long, weighs ounces, and gender can be identified. |
 |
 |
3 |  |  An agent that can cause a birth defect is called a . |
 |
 |
4 |  |  Various diseases and conditions such as rubella, syphilis, genital herpes, and AIDS can produce birth defects. |
 |
 |
5 |  |  As women enter their 30s, they are likely to conceive. |
 |
 |
6 |  |  Maternal consumption of drugs, such as tranquilizers, alcohol, tobacco, marijuana, heroin, and cocaine, affects development. |
 |
 |
7 |  |  Even moderate drinking may the infant's level of attention and alertness. |
 |
 |
8 |  |  Cigarette smoking has been associated with prematurity rates and lower birth weights. problems are also more common in the offspring of smokers. |
 |
 |
9 |  |  During the first and longest stage of childbirth, uterine contractions in frequency, intensity, and become more regular. |
 |
 |
10 |  |  Although surgical removal of an infant from the uterus, a section, is safer than a breech delivery, it does entail other complications. |
 |
 |
11 |  |  One concern is that drugs ingested by the mother can cross the barrier and affect the infant. |
 |
 |
12 |  |  Babies born before 38 weeks after conception are referred to as babies whereas babies who weigh less than pounds at birth are referred to as low birthweight babies. |
 |
 |
13 |  |  Physical changes following delivery include the return of the uterus to its prepregnant size and rapid changes in production. |
 |
 |
14 |  |  Bonding is a controversial concept that implies that there is a period in the development of a close emotional attachment between mother and the infant. |
 |
 |
15 |  |  Sexually transmitted diseases include , which is caused by bacteria and can lead to . |
 |
 |
16 |  |  Genital herpes can cause in infants exposed to the virus during birth. |
 |
 |
17 |  |  AIDS destroys the body's system. |
 |
 |
18 |  |  can result from maternal use of alcohol during pregnancy. |
 |