Third trimester
Weeks 28–40
Everything about the Third trimester: your baby's development, how you may feel, and what to expect week by week.
The Third trimester month by month
Month 7Weeks 28–31
Everything about month 7 of pregnancy: weeks 28 to 31, your baby’s development, the changes you may notice, and practical tips for each week.
By the end of the month your baby is about the size of coconut, around 41.1 cm and 1502 g.
- Week 28eggplantWelcome to the third trimester! Your baby is now about the size of an eggplant and can blink and tell the difference…
- Week 29butternut squashYour baby is now about the size of a butternut squash, with muscles and lungs growing stronger by the day. The brain is…
- Week 30cabbageYour baby is now about the size of a cabbage, and the soft hair that has covered the body is beginning to shed in…
- Week 31coconutYour baby is now about the size of a coconut and is gaining weight quickly as fat fills out the body into a rounder…
Month 8Weeks 32–35
Everything about month 8 of pregnancy: weeks 32 to 35, your baby’s development, the changes you may notice, and practical tips for each week.
By the end of the month your baby is about the size of a honeydew melon, around 46.2 cm and 2383 g.
- Week 32squashYour baby is now about the size of a squash, with fully formed fingernails and toenails and more hair growing on the…
- Week 33a pineappleYour baby is now about the size of a pineapple and keeps gaining weight, laying down fat that gives the skin a fuller…
- Week 34a cantaloupeAbout the size of a cantaloupe, your baby keeps maturing and building up the layer of fat that will help regulate body…
- Week 35a honeydew melonYour baby is now the size of a honeydew melon and has become noticeably plumper, with most major organs well developed…
Month 9Weeks 36–40
Everything about month 9 of pregnancy: weeks 36 to 40, your baby’s development, the changes you may notice, and practical tips for each week.
By the end of the month your baby is about the size of a small pumpkin, around 51.2 cm and 3462 g.
- Week 36a head of romaine lettuceAbout as long as a head of romaine lettuce, your baby keeps gaining weight and the skin grows softer and pinker as fat…
- Week 37a bunch of Swiss chardYour baby is now about as long as a bunch of Swiss chard and is considered early full term, meaning the organs are…
- Week 38a leekAbout as long as a leek, your baby is largely ready for life outside the womb, with mature organs and a firm grip. Eye…
- Week 39a mini watermelonYour baby is now the size of a mini watermelon and is considered full term, ready to be born at any time. The lungs…
- Week 40a small pumpkinYou have reached week 40, and your baby is the size of a small pumpkin, fully developed and ready to be with you. All…
This guide is for general information and reassurance — it isn't medical advice. Always follow your doctor or midwife for your own pregnancy.