গর্ভাবস্থার সপ্তাহ ক্যালকুলেটর
Find out exactly how many weeks pregnant you are based on your last menstrual period. Track your trimester and key milestones.
এই ক্যালকুলেটর কীভাবে ব্যবহার করবেন
- LMP Year লিখুন
- LMP Month (1-12) লিখুন
- LMP Day লিখুন
- গণনা করুন বোতামে ক্লিক করুন
- ক্যালকুলেটরের নিচে প্রদর্শিত ফলাফলটি পড়ুন
How Pregnancy Weeks Are Counted
Pregnancy is conventionally counted from the first day of your Last Menstrual Period (LMP), even though conception typically occurs about two weeks later. This means a full-term pregnancy lasts approximately 40 weeks from LMP.
Weeks 1–2 are technically before conception, but are included in the standard count. Most pregnancies last between 38 and 42 weeks from LMP, with 40 weeks being the standard due date.
Pregnancy Trimesters
- First Trimester (Weeks 1–13): Major organ development occurs; morning sickness is common
- Second Trimester (Weeks 14–27): Often the most comfortable period; fetal movement becomes noticeable around week 20
- Third Trimester (Weeks 28–40+): Rapid fetal growth; preparation for birth
Key milestones include the heartbeat (week 6–7), anatomy scan (week 18–20), viability (week 24), and full-term status (week 37).
Tracking Your Pregnancy
Regular prenatal care is essential throughout pregnancy. Key appointments include:
- First prenatal visit at 8–10 weeks
- Nuchal translucency scan at 11–14 weeks
- Anatomy scan at 18–20 weeks
- Glucose screening at 24–28 weeks
- Weekly visits from week 36 onward
This calculator provides gestational age estimates. For precise dating, an early ultrasound remains the gold standard.
সর্বশেষ আপডেট: March 2026
Frequently Asked Questions
How accurate is LMP-based pregnancy dating?
LMP dating assumes a regular 28-day cycle with ovulation on day 14. For women with irregular cycles, ultrasound dating is more accurate. The typical margin of error for LMP dating is ±2 weeks.
What if I don't know my LMP date?
If you don't know your last menstrual period, an early ultrasound (before 10 weeks) can date the pregnancy to within 3–5 days. Your healthcare provider can calculate a due date from the baby's measurements.
When does each trimester start and end?
The first trimester runs from week 1 to week 13, the second from week 14 to week 27, and the third from week 28 to delivery (typically week 40). These divisions are based on weeks from LMP.