6 Months Pregnant
A look at weeks 21 through 24
Month 6 (weeks 21–24) reaches the edge of fetal viability. Glucose screening is a key milestone.
Key changes this month
- From week 21, measurement switches to crown-to-heel length (~27 cm).
- Fetal movements grow stronger and more rhythmic.
- Gestational diabetes screen (50 g glucose challenge) at 24–28 weeks.
Weeks in this month
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Textbook averages. Individual variation is wide and this is not medical advice — confirm with your OB.