How Big Is My Baby During Pregnancy? Size Changes by Week Explained
Discover how your baby grows week by week during pregnancy, from a poppy seed at 4 weeks to a watermelon at 40 weeks.
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During pregnancy, your baby's size changes dramatically. At 4 weeks, it's just a poppy seed. By 12 weeks, it's around the size of a lime. Come 20 weeks, your baby is about the length of a banana. At 30 weeks, it's roughly the size of a large cabbage. As you approach 40 weeks, your baby is about the size of a watermelon. Consider using a pregnancy app for weekly size comparisons and detailed growth information.
FAQs & Answers
- How does my baby's size change during pregnancy? Your baby grows rapidly and changes size throughout pregnancy—from the size of a poppy seed at 4 weeks to about a watermelon at 40 weeks.
- What is the average size of a baby at 20 weeks? At 20 weeks, your baby is approximately the length of a banana.
- Are there tools to track baby size weekly during pregnancy? Yes, pregnancy apps offer weekly size comparisons and detailed information about your baby’s growth.