Question

which consequence can occur if a mother uses drugs during pregnancy?

• allergies
• high birth weight
• longer term pregnancy
• sudden infant death syndrome

Explanation:

🆕 New Concept Discovered: Teratogenic Effects on Prenatal Development
How external substances affect fetal health.

Step 1: Analyze the impact of prenatal drug exposure

When a pregnant mother consumes harmful substances (such as illicit drugs, nicotine, or alcohol), these chemicals cross the placenta and directly affect the developing fetus. This exposure can disrupt normal brain development, respiratory control, and overall physical growth.

Step 2: Evaluate the given options

• allergies: Allergies are typically linked to genetic predispositions and environmental exposures after birth, rather than being a direct, primary consequence of prenatal drug exposure.
• high birth weight: Drug exposure during pregnancy is strongly associated with fetal growth restriction, leading to low birth weight, not high birth weight.
• longer term pregnancy: Drug abuse often triggers premature labor, leading to a shorter gestational period (preterm birth), rather than a longer pregnancy.
• sudden infant death syndrome (SIDS): Prenatal exposure to drugs and tobacco significantly damages the infant's developing brainstem, which controls breathing and arousal during sleep. This greatly increases the risk of Sudden Infant Death Syndrome (SIDS).

Answer:

sudden infant death syndrome