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Pregnancy Calendar
Enter your last period date or ultrasound measurement to see your estimated due date and a timeline of pregnancy assessments.
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Assessments during pregnancy
Enter a date to mark the week you are in.
- Weeks 6–10First visit and confirming the pregnancy. Source: MoH Guideline.The location of the pregnancy and the heartbeat are assessed; initial blood and urine tests are requested. The first visit is recommended before week 14.
- Weeks 11–14First-trimester screening (double test + NT). Source: ACOG PB 226.Nuchal translucency measurement and a blood test are used to estimate the risk of chromosomal anomalies. The crown–rump length measured at the same scan dates the pregnancy most reliably.
- Weeks 16–18Second-trimester screening (triple/quadruple test). Source: MoH Guideline.Offered if first-trimester screening was not done or further assessment is needed.
- Weeks 18–22Detailed ultrasound (anomaly scan). Source: AIUM–ACOG–SMFM.The baby’s organ development is assessed system by system. It is the most comprehensive ultrasound examination of pregnancy.
- Weeks 24–28Glucose tolerance test. Source: ACOG PB 190.Screening for gestational diabetes. If there are risk factors, your doctor may request it earlier.
- Week 28Anti-D for Rh incompatibility. Source: ACOG PB 181.If the mother is Rh negative and the father Rh positive, a preventive injection is given around week 28.
- Weeks 28–36Check-ups every two weeks. Source: MoH Guideline.Blood pressure, weight, the baby’s growth and movements are assessed regularly.
- Weeks 36–37GBS screening and birth plan. Source: ACOG CO 797.Group B streptococcus screening is carried out; mode of delivery, place of birth and possible scenarios are discussed together.
- Weeks 37–42Term — birth. Source: ACOG CO 579.From week 37 the pregnancy is considered term. Most births happen within this range; the estimated date is not a single day but the middle of a range.
Sources (8)
- ACOG CO 700 — Methods for Estimating the Due Date. Committee Opinion No. 700 — American College of Obstetricians and Gynecologists, with AIUM and SMFM (2017; reaffirmed 2021).
- MoH Guideline — Doğum Öncesi Bakım Yönetim Rehberi (Antenatal Care Management Guideline) — Republic of Türkiye Ministry of Health, General Directorate of Public Health.
- ACOG PB 226 — Screening for Fetal Chromosomal Abnormalities. Practice Bulletin No. 226 — ACOG (2020).
- AIUM–ACOG–SMFM — Practice Parameter for the Performance of Detailed Second- and Third-Trimester Diagnostic Obstetric Ultrasound Examinations — joint AIUM, ACOG and SMFM parameter.
- ACOG PB 190 — Gestational Diabetes Mellitus. Practice Bulletin No. 190 — ACOG (2018).
- ACOG PB 181 — Prevention of Rh D Alloimmunization. Practice Bulletin No. 181 — ACOG (2017).
- ACOG CO 797 — Prevention of Group B Streptococcal Early-Onset Disease in Newborns. Committee Opinion No. 797 — ACOG (2020).
- ACOG CO 579 — Definition of Term Pregnancy. Committee Opinion No. 579 — ACOG (2013; reaffirmed).
You and your doctor decide together on your personal follow-up plan, tests and mode of delivery.
The content of this page is for information only; please consult your doctor for diagnosis and treatment.
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