Week 12: Reflexes switch on
You’re 12 weeks pregnant — about 28 weeks to go. Your baby is roughly the size of a lime.
Size of
a lime
Length
5.4 cm
2.1 in · crown to rump
Weight
14 g
0.49 oz
Your baby this week
Reflexes are developing — your baby’s fingers can open and close and the mouth makes sucking movements. The digestive system begins practising contractions.
Your body & how you might feel
Many parents have their first-trimester scan and screening around now. The risk of miscarriage drops significantly at the end of this week.
Common symptoms at week 12
- Reduced nausea
- Dizziness
- Visible bump starting
- Skin changes
This week’s tip: The 12-week scan is a lovely milestone — bring your partner or a support person and ask for a printout if you’d like one.
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 12 FAQs
How big is the baby at 12 weeks?
At 12 weeks pregnant, your baby is roughly the size of a lime, about 5.4 cm (2.1 in) long and around 14 g. These are typical averages — every baby grows at its own pace.
How many months is 12 weeks pregnant?
12 weeks pregnant is about 3 months, in the first trimester, with about 28 weeks to go until your due date.
What are common symptoms at 12 weeks?
Common experiences around week 12 include reduced nausea, dizziness, visible bump starting, skin changes. Symptoms vary widely — contact your provider if anything worries you.