The short answer
9 weeks = 3 months
At 9 weeks pregnant, you are about 3 months pregnant — in month 3 of your pregnancy and in your first trimester.
Not sure of your week? Use the pregnancy week calculator to find it from your last period, due date or conception date.
All the essential organs are now under construction. The embryonic "tail" has disappeared and the body is looking distinctly more baby-like.
About the size of a cherry
size comparison
2.3 cm
crown to rump (0.9 in)
2 g
average weight (0.1 oz)
The eyes are fully formed but the eyelids have fused shut, and they will stay that way until the late second trimester. Muscles are developing enough for spontaneous twitches, and the tiny heart has finished dividing into four chambers. Sex organs have begun to form internally, though nothing is visible on ultrasound yet.
Sizes and weights are averages — healthy babies vary widely, and your scan measurements are what count.
Blood volume is climbing steadily, which can leave you a little dizzy on standing and can make veins more visible on your chest and breasts. Headaches are common as hormone levels and hydration needs shift. Nausea and tiredness usually continue at full strength for a couple more weeks.
Common symptoms this week
217
days to go
31
weeks to go
63
days so far
At 9 weeks 0 days you are 63 days into a 280-day pregnancy, which leaves 217 days — 31 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 second trimester (14 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 9 falls in month 3, in the first 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 — 9+3 or 9w3d, 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 |
|---|---|---|---|
| 9 weeks 0 days (this page) | 9+0 | 63 | 217 |
| 9 weeks 1 day | 9+1 | 64 | 216 |
| 9 weeks 2 days | 9+2 | 65 | 215 |
| 9 weeks 3 days | 9+3 | 66 | 214 |
| 9 weeks 4 days | 9+4 | 67 | 213 |
| 9 weeks 5 days | 9+5 | 68 | 212 |
| 9 weeks 6 days | 9+6 | 69 | 211 |
At 9 weeks pregnant, you are about 3 months pregnant — in month 3 of your pregnancy and in your first trimester. Months of pregnancy are counted as uneven 4–5 week buckets so that the full 40 weeks fits into 9 calendar months.
9 weeks is in the first trimester, which runs from week 0 through 13 weeks 6 days. The second trimester begins at 14 weeks 0 days.
About 31 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 9 weeks 0 days you are 63 days into a 280-day pregnancy, so there are 217 days left until the 40-week mark — that's 31 weeks. The count drops by one for each day you move through week 9.
9 weeks is 63 days, counted from the first day of your last menstrual period (9 × 7 = 63). Add the days into your current week for the exact figure — for example 9 weeks 3 days is 66 days.