Question 1

Marty's mother drank during her pregnancy. She often consumed a beer in the evenings, followed by an occasional glass of wine. Marty is shorter and lighter than his peers, he has a below-average head circumference, and has difficulty attending to directions. Marty most likely has:

Accepted Answer

The answer of Marty's mother drank during her pregnancy. She...

Question 2

Each year, about ____ percent of infants are born without defects.

Accepted Answer

According to data from the Centers for Disease Control and Prevention (CDC), about 97% of infants are born without birth defects. This means that only about 3% of infants are born with birth defects, which can range from minor to severe. Factors that can increase the risk of birth defects include genetic disorders, environmental exposures, and maternal health conditions.

Question 3

Globally, _____ accounts for 30 to 50% of HIV transmission in newborns.

Accepted Answer

Breast-feeding is a common mode of transmission of HIV from mother to child, accounting for 30 to 50% of cases globally. Other modes of transmission include during pregnancy, delivery, and through blood during childbirth or breastfeeding. Cesarean delivery and lack of immunization can also have an impact on HIV transmission, but they are not as significant as breastfeeding. Mother-infant contact after birth is important for bonding and supporting the health of the newborn, but it does not increase the risk of HIV transmission if proper precautions are taken.

Question 4

Baby Dante was born blind and deaf and has undergone four surgeries on his heart, with more surgeries planned in the future. Dante was likely exposed to _____ within the first 10 weeks of his mother's pregnancy.

Accepted Answer

Rubella is a viral infection that can cause severe birth defects if contracted during pregnancy, including blindness, deafness, heart defects, and developmental delays. It is most dangerous to fetuses during the first 10 weeks of pregnancy.

Question 5

Which of the following has reduced mother-to-child HIV transmission during childbirth?

Accepted Answer

Cesarean delivery has been shown to significantly reduce the risk of mother-to-child HIV transmission during childbirth. This is because the baby is not exposed to the mother's blood and vaginal fluids during delivery, which can contain the virus. Vaginal delivery and water birth have not been shown to reduce transmission rates, and antibiotics during delivery may only reduce the risk of transmission if the mother has a concurrent infection that could increase viral load.

Question 6

Why is it difficult to determine the effects of prenatal exposure to cocaine and heroin?

Accepted Answer

Prenatal exposure to cocaine and heroin is often accompanied by exposure to other substances, such as alcohol and tobacco, making it difficult to determine the specific effects of each drug. This makes it challenging to isolate the impact of either substance on prenatal development.

Question 7

Which of the following is an example of involuntary exposure to a teratogen?

Accepted Answer

Maternal illness can expose a fetus to teratogens involuntarily, as the mother may not have control over contracting an illness that could affect fetal development.

Question 8

Evidence on the effects of marijuana on prenatal development:

Accepted Answer

Although there is some evidence to suggest that marijuana use during pregnancy may have negative effects on prenatal development, the current research on this topic is limited and not well understood.

Question 9

In the 1950s and early 1960s, many women were prescribed thalidomide to prevent morning sickness. This drug, often taken in early pregnancy, was associated with:

Accepted Answer

Thalidomide was associated with deformities of the arms and legs in babies born to women who took the drug during early pregnancy. This tragic event led to stricter regulations on drug safety testing and approval.

Question 10

Children with fetal alcohol syndrome:

Accepted Answer

Children with fetal alcohol syndrome have a distinct pattern of facial characteristics such as a small head circumference, thin upper lip, and small eye openings. They also have deficits in intellectual development, including learning difficulties, memory problems, and poor judgment. These deficits are often lifelong and cannot be fully recovered with intervention.

Question 11

Research on the effects of caffeine use during pregnancy:

Accepted Answer

Numerous studies have suggested that caffeine intake during pregnancy is not a human teratogen. However, moderate doses can lead to low birth weight and prematurity. There is no evidence to support option B or D.

Question 12

Denise has been using cocaine throughout her pregnancy. Denise's baby is at risk for:

Accepted Answer

Cocaine use during pregnancy can lead to microcephaly, which is a condition where a baby's head is smaller than expected, and neurobehavioral disturbances, which can affect the baby's ability to regulate emotions and behavior.

Question 13

One-month-old Nolan has difficulty regulating his arousal states, shows poor movement skills, poor reflexes, and greater excitability than most infants his age. Nolan was likely exposed to _____ during his mother's pregnancy.

Accepted Answer

Nolan's symptoms are consistent with neonatal abstinence syndrome (NAS), which occurs in infants exposed to drugs such as cocaine and opioids in utero. These drugs can affect the development of the baby's nervous system and lead to difficulty regulating arousal states, poor movement skills, poor reflexes, and increased excitability. Aspirin and caffeine are not typically associated with NAS, and there is limited evidence linking marijuana use during pregnancy to these particular symptoms.

Question 14

Bianca recently found out that she's pregnant. Prior to confirming the pregnancy, Bianca was a heavy smoker. However, she plans to cut back to no more than five cigarettes a day. Bianca:

Accepted Answer

Even cutting back to no more than five cigarettes a day can still increase the risk of a low birth weight baby. Additionally, the statement does not provide any information about whether Bianca is consuming other teratogens or whether her baby may have subtle physical defects.

Question 15

A(n) ______ is an agent that causes damage to prenatal development, producing a birth defect.

Accepted Answer

A teratogen is any agent that can cause birth defects during prenatal development. Chemicals, organisms, and compounds can all be types of teratogens, but the specific term for a substance that causes birth defects is a teratogen.

Question 16

During the embryonic period:

Accepted Answer

During the embryonic period, which lasts from 2-8 weeks after conception, the developing organism is particularly susceptible to damage from teratogens. This is because this is the period when major organs and body systems are forming, making it a critical time for development. Teratogens can interfere with this process, potentially causing significant and long-lasting harm to the embryo.

Question 17

_____-exposed newborns often show signs of addiction and withdrawal symptoms, including tremors, irritability, abnormal crying, disturbed sleep, and impaired motor control.

Accepted Answer

Heroin use during pregnancy can lead to neonatal abstinence syndrome (NAS) in newborns, which includes symptoms of addiction and withdrawal. The other options (nicotine, mercury, and marijuana) may have negative effects on fetal development but don't typically lead to NAS.

Question 18

_____ use during pregnancy has been identified as the leading cause of developmental disabilities.

Accepted Answer

Alcohol use during pregnancy has been identified as the leading cause of developmental disabilities, including fetal alcohol spectrum disorders (FASDs), which can cause physical, behavioral, and intellectual disabilities. Tobacco use during pregnancy can also have harmful effects on fetal development, but it is not the leading cause of developmental disabilities. Caffeine and over-the-counter drugs have not been identified as significant causes of developmental disabilities during pregnancy.

Question 19

Fetal alcohol spectrum disorders:

Accepted Answer

Fetal alcohol spectrum disorders (FASD) refer to a range of effects that can occur in an individual who was exposed to alcohol in the womb. FASD is a continuum and can manifest in a variety of ways, including physical, behavioral, and cognitive effects. It is estimated that 1% of the US population has FASD.

Question 20

Which of the following statements about teratogens is true?

Accepted Answer

Different teratogens can cause the same birth defect (for example, both alcohol and thalidomide can cause limb deformities), and a variety of birth defects can result from the same teratogen (for example, rubella infection during pregnancy can lead to a range of birth defects such as hearing loss, cataracts, and heart defects). Option A is incorrect as teratogens can have an impact on the fetus at any time during pregnancy. Option B is also incorrect as not all birth defects are observable. Finally, option C is incorrect as genetic factors do not play a primary role in the effects of exposure to teratogens, although genetic susceptibility may play a secondary role in some cases.

Quiz 3: The Prenatal Period, Birth, and the Newborn