13 weeks pregnant
Trimester 1
Your baby is about the size of a lemon.
- Length
- 7.4 cm (about 3 in)
- Weight
- 23 g (about 0.8 oz)
What is happening at 13 weeks
Tiny fingerprints have formed and vocal cords are developing. This is the last week of the first trimester.
Not sure exactly how far along you are? Find your estimated due date and follow your pregnancy week by week.
Sizes and weights are typical averages and vary from baby to baby. This is general information, not medical advice. Your provider is the best guide to how your own pregnancy is progressing.
Sources and further reading
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