40 Weeks Pregnant: Baby Size, Development & Symptoms
| Baby's size | About the size of a jackfruit |
| Length | about 51 cm |
| Weight | about 3.5 kg |
| Trimester | Third trimester, month 9 |
Your baby this week
Your due date! Only a small share of babies arrive exactly on it, and many come a week either side.
Your body this week
If labour has not started, your doctor will discuss monitoring and next steps.
Tip of the week
Keep counting movements and stay in touch with your doctor.
Getting ready for your newborn
Most babies born now weigh 2.5 to 4 kg and fit NB size diapers. Plan on 10 to 12 a day. Pack your hospital bag if you haven't yet.
Quick answers
How big is my baby at 40 weeks?
About the size of a jackfruit: around 51 cm long and around 3.5 kg.
How many months is 40 weeks pregnant?
40 weeks is in month 9 of pregnancy, in the third trimester.