Which of the following statements about the placenta, umbilical cord, and amniotic fluid is correct?

Choice A rationale

Intrauterine growth restriction (IUGR) is a condition where the fetus is smaller than normal, and it is more commonly associated with oligohydramnios, which is an insufficient amount of amniotic fluid. This occurs because the fetus may not be producing enough urine, which is the primary contributor to amniotic fluid after the first trimester.

Choice B rationale

Maternal diabetes mellitus is a common cause of polyhydramnios. Poorly controlled maternal hyperglycemia can lead to fetal hyperglycemia. This, in turn, causes fetal polyuria, or excessive urination, which significantly increases the volume of amniotic fluid. This is due to the osmotic effect of elevated glucose levels in the fetal circulation.

Choice C rationale

Dehydration in the mother is more likely to cause oligohydramnios, not polyhydramnios. When the mother is dehydrated, her blood volume and subsequent placental blood flow may be reduced, which can affect the production of amniotic fluid. This is in contrast to polyhydramnios, which is an excess of amniotic fluid.

Choice D rationale

Chronic hypertension is more typically associated with conditions that can lead to placental insufficiency and oligohydramnios. Poor placental perfusion resulting from hypertension can compromise fetal growth and reduce fetal urinary output, thereby leading to decreased amniotic fluid volume, which is the opposite of polyhydramnios

Choice A rationale

Influenza, or the flu, can cause severe illness in pregnant women and is associated with a higher risk of complications such as pneumonia, preterm birth, and low birth weight. However, it is not typically known to cause the specific congenital malformations mentioned, such as microcephaly and severe neurological issues, in the same way as other infectious agents that can cross the placental barrier.

Choice B rationale

Gonorrhea is a sexually transmitted infection that can be passed to the newborn during delivery, causing neonatal conjunctivitis or blindness. While it can cause serious issues, it is not associated with the embryonic-phase congenital defects like microcephaly, as it typically affects the infant during or after birth, not during the embryonic stage of development.

Choice C rationale

COVID-19 infection during pregnancy can increase the risk of preterm birth, preeclampsia, and stillbirth. While there is ongoing research, it has not been definitively linked to causing the severe congenital defects, such as microcephaly, associated with infections like Cytomegalovirus. Its main impacts are generally related to placental function and respiratory illness in the mother.

Choice D rationale

Cytomegalovirus (CMV) is a common viral infection that, when contracted by a pregnant woman for the first time, can be transmitted to the fetus, particularly during the first trimester (embryonic phase). Congenital CMV is a leading cause of non-genetic neurological damage in newborns, including microcephaly, hearing loss, and intellectual disabilities, due to its teratogenic effects on the developing fetal brain. *.