23 Weeks Pregnant — Baby Is the Size of a Grapefruit
At 23 weeks you are 161 days into the 40-week count, with 119 days to go and 57% of the pregnancy behind you. Baby is about the size of a grapefruit and weighs about 12.9 g. This page fixes week 23 in place: what is developing, which appointments are still ahead, and how the week maps onto months.
57% 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
Hearing sharpens — playing music or reading aloud is genuinely heard. You only feel a fraction of its kicks.
Measured in months, week 23 sits in month 6: Month six is the viability threshold, when a baby born early has a real chance with intensive care.
Appointments still ahead
| Window | Appointment | What it checks |
|---|---|---|
| 24–28 wks | Glucose tolerance test | Screens for gestational diabetes. |
| 28–34 wks | Routine growth checks | Regular midwife visits, bump measurements and blood pressure. |
| 34–36 wks | Group B strep swab | A simple swab that protects the baby during delivery. |
| 37–40 wks | Weekly checkups | Position checks, growth checks and the birth plan in earnest. |
Around week 23
| Week | Size | Weight |
|---|---|---|
| 22 | a papaya | about 11.5 g |
| 23 | a grapefruit | about 12.9 g |
| 24 | an ear of corn | about 14.3 g |
Frequently asked
What does 23 weeks pregnant mean in days and months?
23 weeks is 161 days since the first day of your last period, which is about 6 months pregnant on the four-week-per-month convention. 119 days remain in the 40-week count from here — that is 57% of the way through.
How big is a baby at 23 weeks?
Around the size of a grapefruit, at about 12.9 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 23?
The 2nd 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 23?
Next up: Glucose tolerance test at 24–28 weeks, Routine growth checks at 28–34 weeks, Group B strep swab at 34–36 weeks. The full schedule is in the table above; exact timing varies by country and by your care team.