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Pregnancy Trimester Tracker

Track your pregnancy week by week. See which trimester you are in, your due date, key milestones, and what to expect each week.

Track your pregnancy journey week by week across all three trimesters. Enter your last menstrual period (LMP) or due date to see exactly how far along you are, which trimester you are in, and what developmental milestones are happening right now.

Tips for Pregnancy Trimester Tracker

1

First trimester (weeks 1-12): organ formation; take folic acid, avoid alcohol and raw fish

2

Second trimester (weeks 13-26): often called the 'honeymoon trimester' — energy returns and morning sickness fades

3

Third trimester (weeks 27-40): baby gains most weight; start preparing your hospital bag by week 35

Frequently Asked Questions

How are pregnancy weeks counted?
Pregnancy is counted from the first day of your last menstrual period (LMP), not from conception. So when you are '4 weeks pregnant,' the actual embryo is about 2 weeks old. Full term is 40 weeks (280 days) from LMP.
When does each trimester start?
First trimester: weeks 1-12. Second trimester: weeks 13-26. Third trimester: weeks 27-40. Each trimester is roughly 13 weeks long.
Last updated: April 2026

Data sources: Standard mathematical formulas

For informational purposes only. Not financial, medical, or legal advice. Always consult a qualified professional for decisions affecting your finances or health.

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