Enter gestational age
See the pregnancy month, trimester, percentage completed, and approximate size.
Select a week to see the pregnancy month, trimester, approximate length, weight, size, and development from weeks 1-42.
Explore week-by-week growthSee the pregnancy month, trimester, percentage completed, and approximate size.
The same ranges are used throughout these tools: week 8 is in month 2, and week 40 is in month 9.
| Month | Week range | Trimester |
|---|
Each week includes an illustration, approximate length, weight, and size comparison to make changes easier to follow.
| Image | Week | Month | Length | Weight | Size comparison |
|---|
All results are estimates intended to provide a helpful overview. They do not replace an ultrasound, diagnosis, or medical advice. Length is shown around a weekly reference value. Weight ranges from week 22 use the 10th-90th percentiles from the INTERGROWTH-21st standard.
Move easily from cycle tracking to ovulation, gestational age, due date, conception date, and a week-by-week chart.
Choose a category and continue with the tool you need.
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