Another (more accurate) way to calculate your pregnancy due date is by ultrasound (see below). Of course, not every woman has a 28-day cycle or ovulates exactly mid-cycle (and not everyone remembers with perfect precision the first day of their last period).
Due date calculator by conception plus#
To arrive at your baby due date, count forward 40 weeks (that’s the 38-week gestation plus two weeks) from the first day of your last period and mark a big X on your calendar for Baby Day! Or, if you’d rather not rely on your math right now (the pregnancy brain struggle is real), simply plug the date of your last menstrual cycle into The Bump pregnancy due date calculator above and get instant results. If you have an average-length cycle (about 28 days), your period came about two weeks before you ovulated and conceived. The most common way of determining when baby will be born is to calculate your due date based on your last menstrual period (LMP), which is how a pregnancy calculator works.
Due date calculator by conception how to#
How to Calculate Due Date Based on Last Period That’s where a due date calculator, also known as a pregnancy calculator, helps. It’s enough to make a mom-to-be’s head spin. Conception happens when your egg is fertilized, but since sperm can live inside your fallopian tubes for up to five days waiting for an egg to be released, you could conceive up to five days after having sex. Even if you had sex only once during your six-day fertile period, you may not have actually conceived that day unless you happened to be ovulating. But figuring out an accurate due date based on conception date is easier said than done: Unless you were really deliberate about tracking your ovulation or were able to make a baby in one shot (and had no extracurricular fun with your man otherwise), knowing which day was the big one isn’t clear cut. If you happen to know the exact day you conceived, you could calculate your baby due date by counting 38 weeks from the date of conception (38 weeks is said to be the length of human gestation).
How to calculate due date by conception How to calculate due date based on last period How to calculate due date by ultrasound How to calculate IVF due date How to calculate due date for twins
If you fall into that bucket, see below for how to calculate your due date for an IVF pregnancy. If you conceived through in vitro fertilization (IVF), the pregnancy due date calculator may not be the right method for you. Your doctor will give you your official due date after your first prenatal visit, but when you just gotta know the baby’s birthday now, count down to the big day with The Bump due date calculator. So you’ve found out you’re pregnant-congrats! For many moms-to-be, the next thing on their minds is “when is my due date?” But accurately calculating your pregnancy due date isn’t quite as simple as plotting a nine month forecast (in fact, pregnancy is typically 40 weeks long, which is more than nine months!).
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