Week 13: Last week of trimester one
You’re 13 weeks pregnant — about 27 weeks to go. Your baby is roughly the size of a pea pod.
Size of
a pea pod
Length
7.4 cm
2.9 in · crown to rump
Weight
23 g
0.81 oz
Your baby this week
Tiny bones are forming, vocal cords are developing, and unique fingerprints are taking shape on those little fingertips. Your baby can now curl and flex.
Your body & how you might feel
Welcome to the home stretch of trimester one. Energy often returns and the dreaded nausea usually fades — many call the second trimester the “honeymoon” phase.
Common symptoms at week 13
- More energy
- Visible bump
- Increased libido
- Less nausea
This week’s tip: If you’ve been waiting to share your news, many choose to do so now that the highest-risk weeks have passed.
A gentle reminder: This is an estimate, not medical advice. Dates and figures are general guidance — every pregnancy is different. Your healthcare provider’s assessment, especially from an early ultrasound, always takes priority. Always speak with your provider about your pregnancy.
Week 13 FAQs
How big is the baby at 13 weeks?
At 13 weeks pregnant, your baby is roughly the size of a pea pod, about 7.4 cm (2.9 in) long and around 23 g. These are typical averages — every baby grows at its own pace.
How many months is 13 weeks pregnant?
13 weeks pregnant is about 3 months, in the first trimester, with about 27 weeks to go until your due date.
What are common symptoms at 13 weeks?
Common experiences around week 13 include more energy, visible bump, increased libido, less nausea. Symptoms vary widely — contact your provider if anything worries you.