13 weeks pregnant
At 13 weeks pregnant, the first trimester ends and the structures for hearing begin to develop. You're in the first trimester, about 11 weeks after conception, because pregnancy is counted from the first day of your last period.
Not sure how far along you are? Try the pregnancy week calculator, or get a free ultrasound at a local pregnancy center.
What's developing at 13 weeks
- Week 13 is the last week of the first trimester.
- The face is well formed, the limbs are long and thin, and nails are growing on the fingers and toes.
- ACOG says the structures needed for hearing begin developing around weeks 13 to 16.
From week 14, the fetus keeps growing and maturing. Many people first feel movement around weeks 19 to 21.
If you're not sure what to do
You don't have to decide everything today. It can help to know how far along you are, what all of your options are, and what support is out there.
- Your options: parenting, adoption, and what abortion involves
- Financial help in Michigan: Medicaid, WIC and more
- Fetal development week by week: the full timeline
Sources
- MedlinePlus. Fetal development.
- ACOG. How your fetus grows during pregnancy; Abortion language guide.
- ACOG. Methods for estimating the due date.
Common questions
What is developing at 13 weeks pregnant?
At 13 weeks, the first trimester ends and the structures for hearing begin to develop. The face is well formed, the limbs are long and thin, and nails are growing on the fingers and toes. ACOG says the structures needed for hearing begin developing around weeks 13 to 16.
How many weeks since conception is 13 weeks pregnant?
About 11 weeks. Pregnancy is counted from the first day of your last period, and conception usually happens about two weeks after that.
How can I find out for sure if I'm 13 weeks pregnant?
An ultrasound is the most accurate way to know how far along you are, especially in the first trimester. Many pregnancy centers offer one free.
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