Third trimester · 6 weeks to go
| Fact | Week 34 |
|---|---|
| Days of pregnancy | 232–238 since LMP |
| Gestational age span | 33w0d to 33w6d |
| Trimester | Third trimester (weeks 28–40) |
| Pregnancy month | Month 3 (weeks 9–13) |
| Average length | 17.7 in (crown to heel) |
| Average weight | 4.73 lb |
| Size comparison | a cantaloupe |
| Weeks remaining | 6 (40-week due date) |
Week 34 rounds the corners: fat layers smooth out the skin, the central nervous system is maturing, and the baby would have a strong chance in the outside world if born now.
The fingernails reach the fingertips. The lungs are nearly mature, and surfactant production is in its final weeks of ramp-up. The baby is settling into the head-down position for most pregnancies by now.
Gestationally, week 34 means you are 33 weeks and 0 to 6 days pregnant, day 232 to day 238 counted from the first day of your last period. This is week 7 of the third trimester (weeks 28–40). Appointments step up to every two weeks from week 28. Week 36 brings weekly appointments and lightening. From here the baby gains roughly half a pound a week on average, which is why the third trimester feels measurably heavier by the day. Every number on this page is an average across pregnancies; your own scan dates and your baby's measurements are what actually describe your week 34.
Sudden vision changes, severe headache, or upper-right belly pain warrant an immediate call; they're preeclampsia flags to rule out.
Weeks of pregnancy don't map cleanly to calendar months, but the common division puts week 34 falls in month 3 of pregnancy (weeks 9–13). Week 34 is part of the third trimester, which runs from week 28 to birth. Gestationally, week 34 means you are 33 weeks and 0 to 6 days pregnant.
At week 34 the baby averages 17.7 in long and weighs about 4.73 lb, roughly the size of a cantaloupe. Sizes come from fetal growth charts (crown-to-heel length from week 20), and normal variation week to week is wide; your ultrasound measurements always outrank a chart.