![]() ![]() ![]() It is worked out by adding 280 days (40 weeks) to the first day of your last menstrual period. First, calculate current gestation using one of the other methods, then go to this section and choose a gestational age. The pregnancy calculator gives you an approximate due date. First, calculate current gestation using one of the other methods, then go to this section and choose past or future date.ĭate at future or past gestation: Use to calculate the date at a specific gestation (enter in weeks). Knowing about ovulation can help you understand when you are most fertile and increase the chance of pregnancy. ![]() Gestation at a future or past date: Use to calculate gestation in the future or past. The default for this calculator bases the calculation on a woman's last menstrual period (LMP), under the assumption that childbirth on average occurs at a gestational age (age of a pregnancy calculated from the woman's last menstrual period) of 280 days, or 40 weeks. Input any or all parameters to compare the. If you know the date of the first day of your last menstrual period (LMP), or have. Typically women ovulate about two weeks after their menstrual cycle starts, so the best way to. This calculator will give you a rough idea of when your baby is due. Insert the week and day of your pregnancy that was estimated by the ultrasound this is the gestational age of the fetus or how far you are in your pregnancy. Most pregnancies last around 38 weeks from conception. Insert the date when you had your ultrasound in the Date of ultrasound field. This calculates the current gestational age and gives an estimated date of LMP.Ĭonception date: If conception is known (eg, date of insemination, ovulation or egg retrieval), then the due date can be calculated by adding 266 days. This calculator gives you many options for estimating gestation and delivery dates. To calculate your due date using the Flo calculator, follow these steps: 1. Ultrasound due date: If a due date has been calculated from an ultrasound in the first trimester, the reverse calculation method is preferred. Last menstrual period (LMP): The LMP calculation uses the standard method of the first day of your last menstrual period plus 280 days to calculate the due date. This calculator allows you to calculate the following: ![]()
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