38 Weeks Pregnant — Baby Is the Size of a Bunch of leeks
At 38 weeks you are 266 days into the 40-week count, with 14 days to go and 95% of the pregnancy behind you. Baby is about the size of a bunch of leeks and weighs about 36.4 g. This page fixes week 38 in place: what is developing, which appointments are still ahead, and how the week maps onto months.
95% 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
Baby has a firm grasp and a strong cry ready. True and false labor become a near-daily guessing game.
Measured in months, week 38 sits in month 9: The final month: weekly checks, a due date that is a midpoint rather than a deadline, and full-term from week 37.
Appointments still ahead
No routine screening remains in the standard schedule — from here it is monitoring rather than testing.
Around week 38
| Week | Size | Weight |
|---|---|---|
| 37 | a bunch of Swiss chard | about 34.6 g |
| 38 | a bunch of leeks | about 36.4 g |
| 39 | a pumpkin | about 38.2 g |
Frequently asked
What does 38 weeks pregnant mean in days and months?
38 weeks is 266 days since the first day of your last period, which is about 9 months pregnant on the four-week-per-month convention. 14 days remain in the 40-week count from here — that is 95% of the way through.
How big is a baby at 38 weeks?
Around the size of a bunch of leeks, at about 36.4 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 38?
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 38?
The routine schedule ends at 40 weeks. From here the focus is monitoring: position checks, growth checks and a discussion about induction if the pregnancy runs past 41 weeks.