How do you calculate due date from conception?

How do you calculate due date from conception?

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 many weeks pregnant am I since conception?

Remember, conception most likely occurred about 14 days into your last cycle, whereas pregnancy is calculated from the beginning of that cycle, so there’s a two-week difference. For example, when you’re six weeks pregnant, your baby’s gestational age is only four weeks.

How can I be 4 weeks pregnant when I conceived 2 weeks ago?

It can be confusing during the first month because pregnancy (which is an average of 40 weeks long) is actually measured from the first day of your last menstrual period. Even though you likely ovulated and conceived only two weeks ago, technically, you’re considered to be four weeks along.

Why are you considered two weeks pregnant at conception?

Your weeks of pregnancy are dated from the first day of your last period. This means that in the first 2 weeks or so, you are not actually pregnant – your body is preparing for ovulation (releasing an egg from one of your ovaries) as usual.