This means the baby will likely be born on May 19. Look for August 12 on the calendar and then add 41 weeks. A due date is the day which commemorates 40 weeks of pregnancy, counting back from the first day of the last period. This result will give you the probably weeks with which the baby will be born, which you can then check on the calendar.įor example, if you conception date was August 12, add 12 + 280 days and then divide by 7. The EDD can then be calculated by adding 266. If you are certain of the conception day, you can add 280 days to the day and divide this by 7 (for 7 days of the week). Calculation of the best estimated due date (EDD) is based on the day of the date of ovulation and fertilization. How to calculate due date from conception date Your health care provider will confirm the babys gestational age. Conception Date: If you have been using an ovulation predictor kit or tracking your ovulation you may be able calculate your due date based on the precise date. With this information, the doctor can predict the due date with greater accuracy.Įven though it is more precise, this due date can still be changed, as the birth will be determined by the baby and the mother’s body, especially if a vaginal birth is imminent. Are you expecting Use this pregnancy due date calculator to find out when your baby is due. Ultrasound is the most accurate way of determining a due date, as the technologist can visualize certain growth parameters and compare them to the average fetal growth markers of other babies. How to calculate due date from ultrasound The baby may be born before or after this date. If sperm and egg meet, you're on your way to pregnancy. A simple method to calculate the due date is to add seven days to the date of the first day of your last period, then add nine months. But some women can go beyond that to 41 weeks. Weeks 1 & 2 of your pregnancy is Baby Conceived It's ovulation time. The due date is 40 weeks from the first day of your last menstrual period (LMP). ![]() ![]() Charlsie Celestine, Flo board member, obstetrician, and gynecologist (OB-GYN), explains. This day is just a guide for the women and her doctor, as the baby may not be born on this exact date. The 9 months of a pregnancy are actually 40 weeks, Dr.
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