Ovulation typically occurs on day 14 of a 28-day menstrual cycle, so adding 266 days to your conception date will give you your baby’s due date. The date of conception is essentially the date you ovulated, which can be used to calculate your estimated due date.
If fertilization doesn’t occur within this time period, the egg dissolves. This is the part of your menstrual cycle when a mature egg leaves your ovary in the hopes of becoming fertilized in the 12 to 24 hours after release. If you were tracking your cycle you may know your ovulation date and use this date of conception to estimate your due date. So although you won’t be seeing your period for a while, Aunt Flo can actually help you discover your estimated pregnancy due date. You can also count back 3 calendar months from the first day of your last period, then add 1 year and 7 days to that date.īaby center has copy about why it’s 40 weeks + ovulation that could be good to add something similar Find the date that marks the first day of your last period.On average, pregnancies last around 40 weeks, or 280 days. Using the first day of your last menstrual period is the most common method for calculating your due date. Take a look below at how each of these methods works. Our due date calculator gives you the option of two methods to determine when your baby will arrive: the date of your last menstrual period or your conception date, also known as ovulation date. She is the owner of The Genesis Resort for Birth and an Assistant Professor of Nursing at James Madison University. Heather has 15 years of women’s health and obstetrics experience.
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