The short answer
23 weeks = 6 months
At 23 weeks pregnant, you are about 6 months pregnant — in month 6 of your pregnancy and in your second trimester.
Not sure of your week? Use the pregnancy week calculator to find it from your last period, due date or conception date.
Loud sounds from the outside world can now be heard in the womb — and may even be recognized after birth.
About the size of a grapefruit
size comparison
28.9 cm
crown to heel (11.4 in)
500 g
average weight (1.1 lb)
The lungs are developing the tiny air sacs and blood vessels needed for breathing, though they will not be ready for air for many more weeks. Skin is still wrinkled and reddish because it is growing faster than the fat beneath it. Rapid eye movements can be seen, and the fetus is putting on weight more quickly now.
Sizes and weights are averages — healthy babies vary widely, and your scan measurements are what count.
Weight gain often speeds up from here, and you may notice a bigger appetite. Swelling in the hands can make rings tight; a bit of puffiness is normal, but sudden swelling in the face or hands should be reported. Some people develop leaky breasts or find their gums bleeding more.
Common symptoms this week
119
days to go
17
weeks to go
161
days so far
At 23 weeks 0 days you are 161 days into a 280-day pregnancy, which leaves 119 days — 17 weeks — until 40 weeks. That number drops by one for every day you move through this week. Remember the due date is an estimate: only about 1 in 20 babies is born on it, and most arrive within two weeks on either side.
Next milestone: 35 days until the third trimester (28 weeks 0 days).
A calendar month averages about 4.3 weeks — not 4 — so you can't just divide your week number by four. Instead, months of pregnancy are counted as uneven buckets of 4 to 5 weeks, arranged so the full 40 weeks fits into 9 calendar months. Week 23 falls in month 6, in the second trimester.
Your care team will always use weeks and days rather than months, because screening windows and term definitions are set by exact week — months are just the everyday shorthand. For the full conversion, see the weeks to months chart, or go the other way with the months-to-weeks guide.
Your notes will show a week and a day — 23+3 or 23w3d, for example. Pick the exact day you are on for its own day count, countdown and month answer.
| Week + day | Shorthand | Days pregnant | Days to go |
|---|---|---|---|
| 23 weeks 0 days (this page) | 23+0 | 161 | 119 |
| 23 weeks 1 day | 23+1 | 162 | 118 |
| 23 weeks 2 days | 23+2 | 163 | 117 |
| 23 weeks 3 days | 23+3 | 164 | 116 |
| 23 weeks 4 days | 23+4 | 165 | 115 |
| 23 weeks 5 days | 23+5 | 166 | 114 |
| 23 weeks 6 days | 23+6 | 167 | 113 |
At 23 weeks pregnant, you are about 6 months pregnant — in month 6 of your pregnancy and in your second trimester. Months of pregnancy are counted as uneven 4–5 week buckets so that the full 40 weeks fits into 9 calendar months.
23 weeks is in the second trimester, which runs from 14 weeks 0 days through 27 weeks 6 days. The third trimester begins at 28 weeks 0 days.
About 17 weeks until the 40-week mark — though only about 1 in 20 babies arrives exactly on the due date. Most are born within two weeks on either side of it.
At 23 weeks 0 days you are 161 days into a 280-day pregnancy, so there are 119 days left until the 40-week mark — that's 17 weeks. The count drops by one for each day you move through week 23.
23 weeks is 161 days, counted from the first day of your last menstrual period (23 × 7 = 161). Add the days into your current week for the exact figure — for example 23 weeks 3 days is 164 days.