Which fetal risk is associated with chronic hypoxia?

Which fetal risk is associated with chronic hypoxia?

• A. IUGR
• B. Macrosomia
• C. Hyperemesis gravidarum
• D. Polyhydramnios

Answer: (A)

Chronic hypoxia from placental insufficiency causes the fetus to slow its growth to conserve oxygen and nutrients, leading to intrauterine growth restriction. The body prioritizes blood flow to essential organs (brain-sparing effect), which supports brain growth but reduces overall fetal growth. This pattern results in a smaller fetus for gestational age and can be detected as a lag in fundal height and ultrasound-estimated fetal weight. In chronic hypoxia, amniotic fluid is more often reduced (oligohydramnios) due to decreased fetal urine output, rather than increased fluid. Macrosomia is excessive fetal growth typically linked to maternal diabetes, not chronic hypoxia. Hyperemesis gravidarum is a maternal condition affecting the mother’s fluid and nutrition status and does not define chronic fetal hypoxia risk. Polyhydramnios—excess amniotic fluid—occurs with conditions like fetal anomalies, twin gestation, or maternal diabetes, not the typical course of chronic hypoxia leading to growth restriction.

Chronic hypoxia from placental insufficiency causes the fetus to slow its growth to conserve oxygen and nutrients, leading to intrauterine growth restriction. The body prioritizes blood flow to essential organs (brain-sparing effect), which supports brain growth but reduces overall fetal growth. This pattern results in a smaller fetus for gestational age and can be detected as a lag in fundal height and ultrasound-estimated fetal weight. In chronic hypoxia, amniotic fluid is more often reduced (oligohydramnios) due to decreased fetal urine output, rather than increased fluid.

Macrosomia is excessive fetal growth typically linked to maternal diabetes, not chronic hypoxia. Hyperemesis gravidarum is a maternal condition affecting the mother’s fluid and nutrition status and does not define chronic fetal hypoxia risk. Polyhydramnios—excess amniotic fluid—occurs with conditions like fetal anomalies, twin gestation, or maternal diabetes, not the typical course of chronic hypoxia leading to growth restriction.