During preconception counseling, the nurse explains that during the first 8 weeks the fetus is most vulnerable to the effects of teratogens.
What is occurring during the first 8 weeks of gestation?
Placenta formation.
Fertilization.
Organogenesis.
Implantation.
The Correct Answer is C
Choice A rationale
Placenta formation begins shortly after implantation, but it continues to develop throughout the first trimester and into the early second trimester, making it less precise to attribute the
first 8 weeks solely to this process.
Choice B rationale
Fertilization occurs within the first week after ovulation, marking the beginning of pregnancy, but it is a singular event that happens prior to the developmental processes vulnerable to teratogens.
Choice C rationale
Organogenesis is the critical period during which the major organs and structures of the fetus form, typically occurring between the third and eighth weeks of gestation. This is the
time when the fetus is most susceptible to the effects of teratogens, which can cause congenital anomalies.
Choice D rationale
Implantation occurs approximately 6-10 days after fertilization, embedding the blastocyst into the uterine lining. While crucial, it is not the primary period when teratogenic effects are
most significant, as this happens during organogenesis.
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Correct Answer is C
Explanation
Choice A rationale
Decreased deep tendon reflexes are not typically associated with preeclampsia. In fact, hyperreflexia or increased deep tendon reflexes might be observed due to central nervous
system irritability in preeclampsia.
Choice B rationale
Uterine contractions are related to labor and not a specific indicator of preeclampsia. While they might occur simultaneously, they are not diagnostic of preeclampsia.
Choice C rationale
Proteinuria, the presence of excess protein in the urine, is a key diagnostic criterion for preeclampsia. It indicates kidney involvement and is used along with elevated blood pressure to diagnose this condition.
Choice D rationale
Increased blood glucose levels are associated with gestational diabetes rather than preeclampsia. Elevated blood pressure and proteinuria are the hallmarks of preeclampsia.
Correct Answer is C
Explanation
Choice A rationale
Clapping hands to assess hearing is not a reliable method and could startle the baby for reasons unrelated to hearing ability.
Choice B rationale
While a newborn might respond to visual stimuli, this is not a definitive method to assess hearing.
Choice C rationale
Routine hearing screenings using objective tests are the best way to determine a newborn's hearing ability, providing accurate and early detection of potential hearing issues.
Choice D rationale
This statement is misleading, as some forms of hearing loss can be inherited. It's important to use accurate methods to assess newborn hearing.