A client expresses concern about teratogen exposure on fetal development.Which factor does the nurse emphasize as a priority related to the effects of teratogen exposure?
The mother’s size.
The timing and duration of exposure.
The type of teratogen.
The father’s health.
The Correct Answer is B
Choice A rationale
The mother’s size does not significantly impact the effects of teratogen exposure on fetal development. Teratogens are substances that cause congenital abnormalities in a developing fetus, and their impact is more related to the timing, duration, and type of exposure rather than the mother’s physical characteristics.
Choice B rationale
The timing and duration of exposure are critical factors in determining the effects of teratogen exposure. Teratogens can cause the most harm during specific periods of fetal development, particularly during the first trimester when organogenesis occurs. The duration of exposure also influences the severity of the effects, with prolonged exposure leading to more significant developmental issues.
Choice C rationale
The type of teratogen is also important, as different teratogens can cause different types of congenital abnormalities. For example, alcohol can lead to fetal alcohol syndrome, while certain medications can cause neural tube defects. However, the timing and duration of exposure are generally considered more critical factors.
Choice D rationale
The father’s health does not directly impact the effects of teratogen exposure on fetal development. Teratogens affect the fetus through the mother’s exposure to harmful substances during pregnancy.
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Correct Answer is C
Explanation
Choice A rationale
A blood transfusion just after delivery is not a standard intervention for a client with Rh-negative blood type. The primary concern for Rh-negative clients is the potential for Rh incompatibility with the fetus, which can lead to hemolytic disease of the newborn. This condition is prevented by administering RhO(D) immune globulin during pregnancy.
Choice B rationale
Maternal serum alpha-fetoprotein (MSAFP) testing is used to screen for certain fetal abnormalities, such as neural tube defects, but it is not specifically related to Rh incompatibility. The primary intervention for Rh-negative clients is the administration of RhO(D) immune globulin to prevent sensitization.
Choice C rationale
RhO(D) immune globulin is administered at around 28 weeks of gestation to prevent Rh sensitization in Rh-negative clients. This intervention is crucial for preventing the development of antibodies that could harm the fetus in current or future pregnancies.
Choice D rationale
A three-hour glucose tolerance test is used to screen for gestational diabetes, which is a separate concern from Rh incompatibility. The primary intervention for Rh-negative clients is the administration of RhO(D) immune globulin.
Correct Answer is B
Explanation
Choice A rationale
Fetal movements, known as quickening, are typically felt by the mother between 16 and 25 weeks of pregnancy, not specifically at week 245.
Choice B rationale
The baby’s heartbeat can be detected by 10-12 weeks of pregnancy using a Doppler ultrasound device. This is an important milestone in fetal development and prenatal care
.
Choice C rationale
Lanugo, the fine hair covering the fetus, usually appears around 20 weeks of pregnancy and starts to disappear closer to the end of the third trimester, not specifically by week 355.
Choice D rationale
The sex of the baby is determined at conception, but it can be detected via ultrasound around 18-20 weeks of pregnancy, not by week 85.