🤰 Pregnancy week by week

12 Weeks Pregnant: Baby Size, Development & Symptoms

Your baby is about the size of a plum.

By Cushies Editorial Team · 2 min read · Updated 25 August 2026

Baby's size	About the size of a plum
Length	about 5.4 cm
Weight	about 14 g
Trimester	First trimester, month 3

Your baby this week

Reflexes are developing; the baby may curl their fingers and toes.

Your body this week

The risk of miscarriage drops considerably after the first trimester.

Tip of the week

Many families choose to share their news around now.

Quick answers

How big is my baby at 12 weeks?

About the size of a plum: around 5.4 cm long and around 14 g.

How many months is 12 weeks pregnant?

12 weeks is in month 3 of pregnancy, in the first trimester.

This article is general information, not medical advice. If you are worried about your health or your baby's, please talk to your doctor.

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