In cases where the date of conception is known precisely, such as with in vitro fertilization, the EDD is calculated by adding 266 days to the date of conception. Ultrasound uses the size of the fetus to determine the gestational age (the time elapsed since the the first day of the last menstrual period).

How accurate is a conception date calculator?

How Accurate are Pregnancy Calculators? According to BabyCenter, only about one in twenty women deliver on their due dates. Its important to understand that a pregnancy calculator based on your conception date will offer a good approximation of the babys arrival.

What is the most accurate way to calculate conception?

You have several options for determining your conception date: An ultrasound is the most accurate way to see how far along your pregnancy is. Ultrasounds provide a detailed look at your babys development and give a good estimate of when you conceived.

Is conception date the day I got pregnant?

The short answer to the question, “Can I find out the exact day I got pregnant?” is, probably not. Determining the exact date of conception is difficult for several reasons. Some things to consider: First of all, pregnancy occurs when an ovulated female egg and and male sperm meet and fertilization occurs.

Is your conception date the day you got pregnant?

The short answer to the question, “Can I find out the exact day I got pregnant?” is, probably not. Determining the exact date of conception is difficult for several reasons. Some things to consider: First of all, pregnancy occurs when an ovulated female egg and and male sperm meet and fertilization occurs.