Second Trimester: Weeks 13-27

Content reviewed against published ACOG, AAP guidelines

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The second trimester spans weeks 13 through 27 and is often called the "golden trimester."

All content follows our editorial policy and is reviewed against published clinical guidelines.

2,705 evidence-based guides6 authoritative medical sources

Bottom line

The second trimester brings many changes. Talk to your healthcare provider about any concerns.

Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.