The short answer
27 weeks = 6 months
At 27 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.
The second trimester is ending. The fetus now has regular sleep and wake cycles — and you may feel rhythmic little jumps when it hiccups.
About the size of a head of cauliflower
size comparison
36.6 cm
crown to heel (14.4 in)
875 g
average weight (1.9 lb)
The retina is fully formed and the fetus can respond to light and dark through the uterine wall. The brain is developing tissue rapidly, and the lungs, liver and immune system continue to mature. Muscle tone is improving, so kicks and stretches feel more purposeful.
Sizes and weights are averages — healthy babies vary widely, and your scan measurements are what count.
Leg cramps, especially at night, tend to peak in the last trimester. Swelling may be more noticeable, and some people develop carpal tunnel symptoms from fluid pressing on wrist nerves. Snoring often gets louder as nasal tissues swell.
Common symptoms this week
91
days to go
13
weeks to go
189
days so far
At 27 weeks 0 days you are 189 days into a 280-day pregnancy, which leaves 91 days — 13 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: 7 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 27 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 — 27+3 or 27w3d, 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 |
|---|---|---|---|
| 27 weeks 0 days (this page) | 27+0 | 189 | 91 |
| 27 weeks 1 day | 27+1 | 190 | 90 |
| 27 weeks 2 days | 27+2 | 191 | 89 |
| 27 weeks 3 days | 27+3 | 192 | 88 |
| 27 weeks 4 days | 27+4 | 193 | 87 |
| 27 weeks 5 days | 27+5 | 194 | 86 |
| 27 weeks 6 days | 27+6 | 195 | 85 |
At 27 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.
27 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 13 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 27 weeks 0 days you are 189 days into a 280-day pregnancy, so there are 91 days left until the 40-week mark — that's 13 weeks. The count drops by one for each day you move through week 27.
27 weeks is 189 days, counted from the first day of your last menstrual period (27 × 7 = 189). Add the days into your current week for the exact figure — for example 27 weeks 3 days is 192 days.