The Baby Blog: Fetal Development

This fact sheet is about the critical periods of development and types of birth defects that can result from exposures at different stages of pregnancy. This information should not take the place of medical care and advice from your healthcare provider. What are critical periods of development? In pregnancy, each part of the baby’s body forms at a specific time. During these times, the body can be very sensitive to damage caused by some medications, alcohol, or other harmful exposures. …

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