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Calculate your pregnancy due date, track your baby's growth week by week, and discover important milestones throughout your pregnancy journey. Based on standard medical guidelines and Naegele's rule.
Enter your last period date or conception date to calculate your due date and track your pregnancy progress.
This pregnancy calculator helps you estimate your due date and track your pregnancy week by week using medically recognized calculation methods. Simply enter the first day of your last menstrual period (LMP) or your conception date. The calculator will provide your estimated due date, current pregnancy week, trimester, and important pregnancy milestones. Remember that this is an estimate - your healthcare provider will confirm your due date through ultrasound examination.
Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period. This is based on Naegele's rule, which assumes a 28-day menstrual cycle with ovulation occurring on day 14. If you know your exact conception date, the calculator adds 266 days (38 weeks) to determine your due date.
Every week of pregnancy brings new developments. By week 6, your baby's heart begins beating. By week 12, all major organs are formed. Around week 20, you'll have your anatomy scan. By week 28, baby's eyes can open. At week 37, your baby is considered full-term and ready for birth.
While the pregnancy calculator provides an estimated due date, only about 5% of babies are born on their exact due date. Factors that can affect accuracy include irregular menstrual cycles, uncertainty about LMP date, variations in cycle length, and individual differences in pregnancy duration. Your healthcare provider may adjust your due date based on early ultrasound measurements, which are most accurate when performed between 8-13 weeks.
The pregnancy calculator provides an estimated due date based on your last menstrual period or conception date. The estimate is typically accurate within 1-2 weeks for women with regular cycles. However, only about 5% of babies are born on their exact due date. Your healthcare provider may adjust your due date based on ultrasound measurements, which are considered more accurate, especially when performed in the first trimester.
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). If you know your conception date, add 266 days (38 weeks). This is based on Naegele's rule, which assumes a 28-day menstrual cycle with ovulation on day 14.
Pregnancy is divided into three trimesters: First trimester (weeks 1-12), Second trimester (weeks 13-26), and Third trimester (weeks 27-40). Each trimester has distinct developmental milestones and physical changes for both mother and baby.
Most first-time mothers start showing between 12-16 weeks of pregnancy. Women who have been pregnant before may show earlier, around 8-12 weeks. Factors like body type, muscle tone, and baby's position also affect when you'll show.
The baby's gender can typically be determined through ultrasound between 18-22 weeks of pregnancy during the anatomy scan. Some non-invasive prenatal tests (NIPT) can determine gender as early as 10 weeks, though these are primarily used for genetic screening.
Gestational age is calculated from the first day of your last menstrual period and is what doctors use to track pregnancy. Fetal age (or conceptional age) is calculated from conception and is about 2 weeks less than gestational age.
For the most accurate results, take a pregnancy test on the first day of your missed period or about 14 days after conception. Some sensitive tests can detect pregnancy as early as 10 days after conception, but waiting until your missed period reduces false negatives.
Common early pregnancy signs include missed period, nausea (morning sickness), breast tenderness, fatigue, frequent urination, mood swings, light spotting (implantation bleeding), and food aversions or cravings. However, symptoms vary greatly among women.
Typical prenatal visit schedule: Weeks 4-28: once every 4 weeks, Weeks 28-36: once every 2 weeks, Weeks 36-40: once every week. High-risk pregnancies may require more frequent visits. Your first prenatal visit usually occurs around 8-10 weeks.
Yes, most women can safely exercise during pregnancy. Recommended activities include walking, swimming, prenatal yoga, and low-impact aerobics. Aim for 150 minutes of moderate exercise per week. Avoid contact sports, activities with fall risk, and exercises lying flat on your back after the first trimester. Always consult your healthcare provider first.
Important: This pregnancy calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider for personalized medical guidance regarding your pregnancy.
This calculator uses standard medical formulas (Naegele's rule) based on guidelines from leading health organizations. For comprehensive pregnancy care and medical advice, consult these authoritative sources:
Last Updated: December 24, 2024 | Content Based On: ACOG Practice Guidelines and CDC Recommendations