Will my due date change when I have a scan? Knowing this can help you to be prepared for labour and birth, and to have everything ready for your new baby. In fact, only about four in 100 babies are born on their due date! But it is likely that your baby will arrive in the few weeks either side of your estimated due date. Your due date is a best guesstimate, but unfortunately, no one can say for sure exactly when your little one will arrive. Will my baby definitely be born on my due date? If you had a day 3 embryo transfer, count 263 days. If you had a day 5 embryo transfer, count 261 days from your transfer date. If you conceived through IVF, you can calculate your due date using your IVF transfer date. The challenge with this method is that getting your date of conception right can be tricky as you won’t necessarily conceive on the day you have sex. If you’ve been using an ovulation predictor kit or tracking your cycle using an app then you may be able to calculate your due date using your conception date. Other ways to calculate your due date Conception date Our Ovulation Calculator uses the date of your last menstrual period and your typical cycle length to discover the days you were most likely to have been fertile. Our pregnancy due date calculator uses this information to give you an estimated due date. The average pregnancy lasts between 37 weeks and 42 weeks. Most women ovulate about two weeks after the first day of their period, and conceive shortly afterwards. Health professionals often call this your LMP, or last menstrual period. That's why your baby’s due date is often based on the date of your last period instead. How we calculate your baby’s due dateĮven if you've been tracking your ovulation, there's no way to know for sure exactly when you ovulated and conceived. If the father also provides an X chromosome, the baby will be a girl.And we suggest other calculation methods to use, including a due date calculation for IVF pregnancies.

Because the mother is only able to provide an X chromosome, the father must provide a Y chromosome if the baby is going to be a boy. It is at this moment that the genetic makeup of the baby is determined, including the sex. After the sperm enters the egg, the coating around the egg is altered to keep other sperm from also penetrating the egg. What happens during fertilization?įor fertilization to occur sperm must first be introduced to the egg and must then penetrate the egg. If you don't ovulate, you can't get pregnant. For about twenty-four hours after ovulation, the egg can be fertilized.įinding out when and if you ovulate is one of the most important factors when trying to get pregnant. This is ovulation and it typically occurs approximately two weeks prior to your menstrual period. Eventually, the follicle matures and releases the egg from the ovary. Usually one of these follicles will begin to mature and the others will stop growing and eventually degenerate. That is usually the day when most people consider pregnancy to begin What happens during ovulation?Įvery month, one of your ovaries has immature eggs that begin to develop in what are called follicles. Finally, implantation is when the embryo attaches to the uterus, which is the day of conception. Fertilization occurs when the sperm penetrates the egg. Ovulation is the first step, the ejection of a mature egg from the ovary. There are three primary steps in a pregnancy: ovulation, fertilization, and conception/ implantation.

Conception month to due date month