34 Weeks Pregnant — Baby Is the Size of a Cantaloupe
At 34 weeks you are 238 days into the 40-week count, with 42 days to go and 85% of the pregnancy behind you. Baby is about the size of a cantaloupe and weighs about 29.4 g. This page fixes week 34 in place: what is developing, which appointments are still ahead, and how the week maps onto months.
85% of 280 days. The due date itself is a midpoint, not a deadline: full-term births spread across roughly weeks 37 to 42.
This week
The immune system strengthens and baby's fingernails have grown to the fingertips. It can now distinguish light from dark.
Measured in months, week 34 sits in month 8: Month eight is about position and preparation: growth scans, the birth plan, and the bag by the door.
Appointments still ahead
| Window | Appointment | What it checks |
|---|---|---|
| 37–40 wks | Weekly checkups | Position checks, growth checks and the birth plan in earnest. |
Around week 34
| Week | Size | Weight |
|---|---|---|
| 33 | a pineapple | about 27.7 g |
| 34 | a cantaloupe | about 29.4 g |
| 35 | a honeydew melon | about 31.1 g |
Frequently asked
What does 34 weeks pregnant mean in days and months?
34 weeks is 238 days since the first day of your last period, which is about 8 months pregnant on the four-week-per-month convention. 42 days remain in the 40-week count from here — that is 85% of the way through.
How big is a baby at 34 weeks?
Around the size of a cantaloupe, at about 29.4 g. These are population averages: a scan measurement that differs by a few days is normal and does not by itself mean anything is wrong.
Which trimester is week 34?
The 3rd trimester. The split used here is the same one the calculator applies: the first trimester covers days 1–90, the second 91–195, and the third from day 196 onward. Other sources draw the boundary a week either side, which is why week 13 and week 14 can both be described as "end of the first trimester".
What appointments happen after week 34?
Next up: Weekly checkups at 37–40 weeks. The full schedule is in the table above; exact timing varies by country and by your care team.