Find out exactly how far along you are, which trimester you're in, how big your baby is this week, and which scan is coming up next.
Enter your last period or your due date.
Baby is about the size of .
Estimates only — your ultrasound dating is the final word.
Pregnancy is counted from the first day of your last period, not from conception — so you're already "4 weeks pregnant" at the time of a missed period. That's why a full-term pregnancy is 40 weeks, even though the baby has been growing for about 38.
Weeks are grouped into trimesters: first (weeks 1–13), second (14–27) and third (28–40). Each has its own scans and tests — the tool above tells you what's coming next.
Because pregnancy is dated from the first day of your last period, about two weeks before you actually conceived. A positive test around your missed period already puts you at roughly 4 weeks.
Usually between 18 and 22 weeks for a first pregnancy, often earlier (16–18 weeks) in later pregnancies. Regular kick-counting starts around 28 weeks — try our kick counter.
First trimester: weeks 1–13. Second: weeks 14–27. Third: week 28 until birth. Each trimester has its own routine scans and tests.
It can be. Ultrasound dating, especially in the first trimester, is more accurate than period dates. If your scan gives a different date, your doctor will use the scan.
Dr. Ritika sees patients at Cloudnine Hospital, Phase 3 Industrial Area, Mohali · Mon–Sat, 10 AM – 5 PM.
This tool is for general guidance and does not replace a personal consultation. Your dates will be confirmed by ultrasound. If you have urgent symptoms, seek care promptly.