High levels of cortisol during pregnancy can affect fetal brain development and potentially lead to what later outcome?

• A. Behavioral issues in later life
• B. Increased birth weight
• C. Improved language skills
• D. No effect on development

Answer: (A)

High levels of cortisol during pregnancy can cross the placenta and influence how the fetal brain develops. Cortisol shapes the way the developing brain regions that regulate stress and behavior—like the prefrontal cortex, hippocampus, and amygdala—are wired. This early exposure can program the fetal hypothalamic-pituitary-adrenal (HPA) axis, affecting how the child handles stress later on. As a result, there’s a higher risk of behavioral issues in later life, such as problems with attention, regulation of emotions, anxiety, or other conduct-related challenges.

Increased birth weight isn’t typically linked to high prenatal cortisol; stress exposures are more often associated with growth issues or preterm birth rather than extra weight. Improved language skills aren’t supported by the evidence, and saying there’s no effect ignores the developmental impact that cortisol can have on brain wiring. So the most plausible late outcome is behavioral issues in later life.