What is a known complication of taking beta blockers during pregnancy?

Taking beta blockers during pregnancy is associated with the complication of bradycardia in the fetus and neonate. Bradycardia refers to a slower than normal heart rate, which can manifest as a result of the maternal use of certain medications, including beta blockers. These drugs can cross the placenta and affect the heart rate regulation in the fetus, leading to potential complications such as fetal distress or neonatal complications right after birth.

While other options may present concerns in different contexts, they are not recognized as primary complications linked to beta blocker therapy during pregnancy. Neonatal hyperactivity is not typically associated with beta blockers, as these medications are more likely to suppress the central nervous system rather than stimulate it. Increased proteinuria is generally more associated with pregnancy-related conditions such as preeclampsia rather than a direct effect of beta blockers. Similarly, placental insufficiency is a more complex condition influenced by various factors and is not specifically a direct complication of beta blocking agents.