Enter the first day of your last period to see your current week and the dates of weeks 32, 37, 39 and 40 on a calendar.
From your last period, the tool calculates your current week of pregnancy and the dates of four key weeks: week 32 (last period + 224 days), week 37 (+259 days), week 39 (+273 days) and week 40, the estimated due date (+280 days). The dates are marked in color on the calendar. For a future date or a result over 45 weeks, the tool asks you to check the date; at 42 weeks 0 days or more it shows a postterm note.
| Week | What it means |
|---|---|
| Week 32 | The eighth month of pregnancy. In higher-risk pregnancies, tests of the baby's well-being (nonstress test, biophysical profile) usually start this week (UpToDate, 2026). |
| Week 37 | Start of early term (37 weeks 0 days to 38 weeks 6 days) |
| Week 39 | Start of full term (39 weeks 0 days to 40 weeks 6 days) |
| Week 40 | Estimated due date. 41 weeks 0 days to 41 weeks 6 days is late term; 42 weeks 0 days or more is postterm (UpToDate, 2025). |
The Turkish Ministry of Health antenatal care guideline plans at least four visits for every pregnancy. The main tests and checks are (Turkish Ministry of Health, 2026):
| Timing | Main tests and checks |
|---|---|
| Visit 1 (first 14 weeks) | Full blood count, blood group (indirect Coombs if the mother is Rh negative and the father Rh positive), hepatitis B surface antigen, syphilis screening, HIV test with consent, TSH, urinalysis and urine culture; rubella IgG if immunity is unknown; glucose screening if there are risk factors |
| Weeks 11–14 | Nuchal translucency (NT) ultrasound and combined test (first-trimester screening) — optional screening after counseling |
| Weeks 16–20 | Maternal serum AFP; triple or quadruple test if the combined test was not done — optional screening after counseling |
| Visit 2 (weeks 18–24) | Fetal anomaly ultrasound; repeat blood count and urinalysis; cervical length if there is a history of preterm birth |
| Weeks 24–28 | Glucose tolerance testing; everyone not in a high-risk group is informed about the 50 g screening test |
| Visit 3 (weeks 28–32) | Blood count; indirect Coombs for Rh incompatibility and anti-D from week 28 if negative; weekly blood pressure checks advised from week 32 |
| Visit 4 (weeks 36–38) | Obstetric ultrasound (number of babies, heartbeat, measurements, placental position, amniotic fluid), blood count, check of the baby's presentation |
Vaccines: Tdap is given between weeks 18 and 24; depending on vaccination history, a Td dose may be needed between weeks 28 and 32. Flu vaccination is advised during flu season (September to April). See the vaccines in pregnancy guide.
In the UK, NICE plans 10 appointments for a first pregnancy and 7 for those who have given birth before. Scans take place between 11 weeks 2 days and 14 weeks 1 day, and between 18 weeks 0 days and 20 weeks 6 days. Appointments are the booking appointment and those at 16, 28, 34, 36 and 38 weeks, plus 41 weeks if the baby has not arrived, with extra appointments at 25, 31 and 40 weeks in a first pregnancy. A glucose tolerance test between 24 weeks 0 days and 28 weeks 0 days is offered to those at risk, anti-D is offered to Rh-negative women at 28 weeks, and sleeping on the back is advised against after 28 weeks. At 36 weeks the baby's position is checked for breech, and at 41 weeks options for prolonged pregnancy are discussed (NICE NG201, 2021).
Every date on the calendar is calculated from the last period you enter; if that date does not reflect your true gestational age, the whole calendar shifts. If your cycles are irregular (varying by 7 days or more), you are unsure of your last period or you conceived while using hormonal contraception, gestational age is set by ultrasound; crown-rump length measured in the first trimester is the most accurate method, and the due date set by the earliest scan is not changed later (UpToDate, 2025). In that case, first use the last period finder to get your ultrasound-based last period, then enter that date here; the same applies after IVF.
The test weeks on this page are the time windows recommended by each organization; the number and timing of visits can change with the risk level of your pregnancy (Turkish Ministry of Health, 2026). The due date is also an estimate: only about 4% of people give birth on that day.
Do not wait for the next date on the calendar if you have any of the following (Turkish Ministry of Health, 2026):
Many pregnant people have swelling of the hands and legs without preeclampsia; swelling of the face and sudden, rapid weight gain need assessment for preeclampsia (UpToDate, 2026). The NHS advises calling immediately if your baby's movements slow down, stop or change pattern, without waiting until the next day, even in the middle of the night.
For signs of labor and when to go to hospital, see this article.
Under the Turkish Ministry of Health guideline: blood and urine tests in the first 14 weeks; first-trimester screening at 11–14 weeks and AFP or the triple/quadruple test at 16–20 weeks (optional, after counseling); the anomaly scan at 18–24 weeks; glucose testing at 24–28 weeks; blood count and, with Rh incompatibility, Coombs testing and anti-D at 28–32 weeks; and an obstetric ultrasound at 36–38 weeks.
Between weeks 11 and 14, together with the nuchal translucency scan (Turkish Ministry of Health, 2026). NICE schedules this scan between 11 weeks 2 days and 14 weeks 1 day. See prenatal screening tests for details.
Between weeks 24 and 28. People with risk factors are screened early, at the first visit. You can interpret your result with the glucose tolerance test tool.
The Turkish Ministry of Health recommends weeks 18–24 and NICE 18 weeks 0 days to 20 weeks 6 days. If only one screening scan is done, the best time is 18–20 weeks (UpToDate, 2025).
39 weeks 0 days is the start of full term, which lasts until 40 weeks 6 days. Weeks 37 and 38 are early term (UpToDate, 2025).
No, it is an estimate. About 4% of people give birth on that exact day; labor can start before or after it (UpToDate, 2025).
Last updated: .