Second trimester

7 Months Pregnant

A look at weeks 25 through 28

Month 7 (weeks 25–28) opens the third trimester. Brain development accelerates and late-pregnancy symptoms emerge.

Key changes this month

  • Weeks 25–26: alveoli form and surfactant production begins in the lungs.
  • Heartburn and indigestion worsen as the uterus presses on the stomach.
  • Glucose tolerance test (100 g) if initial screen was positive.

Weeks in this month

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Textbook averages. Individual variation is wide and this is not medical advice — confirm with your OB.