Pregnancy week by week / Week 9
9 weeks pregnant
That’s 3 months — the first trimester, with 31 weeks to go.
Baby size at 9 weeks
Your baby is about 2.3 cm (0.9 in) long and weighs about 2 g — roughly the size of a cherry.
What’s happening at 9 weeks
The basic body structure is in place and the heart has divided into four chambers. Tiny muscles are beginning to develop.
Common symptoms at 9 weeks pregnant
- •Nausea
- •Mood swings
- •Dizziness
- •Frequent urination
- •Tender breasts
Every pregnancy is different — you may have all, some or none of these. Contact your doctor or midwife about anything that concerns you.
Count down to your due date
If you’re 9 weeks pregnant today, your due date is around Tuesday, January 19, 2027. Adjust the date below and create a free countdown to share.
First day of your last menstrual period (how doctors date a pregnancy)
⚕️ This is an estimate based on Naegele’s rule (40 weeks from your last period). Only about 1 in 20 babies arrive on the exact due date. Always confirm with your doctor or midwife.
FAQ
How many months is 9 weeks pregnant?
9 weeks pregnant is about 3 months, in the first trimester.
How big is the baby at 9 weeks?
At 9 weeks the baby is about 2.3 cm (0.9 in) long and weighs about 2 g — roughly the size of a cherry.
What are the symptoms at 9 weeks pregnant?
Common symptoms around 9 weeks include nausea, mood swings, dizziness, frequent urination. Symptoms vary a lot from person to person — contact your provider if anything worries you.
When is my due date if I am 9 weeks pregnant?
If you are exactly 9 weeks pregnant today, your estimated due date is around Tuesday, January 19, 2027 — 31 weeks from now. Use the calculator below with your real last-period date for a personalised estimate.
See every stage on the pregnancy week-by-week guide or open the full due date calculator.