![]() ![]() Learn more about ultrasound scans in pregnancy. ![]() It's known as the dating and viability scan, and is used to give you a more accurate due date, based on the size and development of your baby. First day of your last menstrual period (Natural conception, fertility drugs or IUI) Date of your egg retrieval (Fresh IVF) Date of day 3 embryo transfer (Fresh or frozen IVF) Date of day 5 blastocyst transfer (Fresh or frozen IVF) Next, chose the date. Your first pregnancy scan will probably happen when you're between six weeks and nine weeks pregnant. To calculate, choose from below: First chose the method to calculate your dates. 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 a small number of babies are born on their exact due date! But it is likely that your baby will arrive in the few weeks either side of your estimated due date. Unfortunately, no one can say for sure exactly when your baby will arrive. Will my baby definitely be born on my due date? There are several methods for calculating the weeks of pregnancy. Our calculator uses this information to give you an estimated due date. The date the baby will be born is expressed as the week of pregnancy calculation. That’s nine calendar months and seven days, or 40 weeks. Your pregnancy should last approximately 282 days. Most women ovulate about two weeks after the first day of their period, and conceive shortly afterwards. That's why your due date is calculated based on the date of your last period instead. How is my pregnancy due date calculated?Unless you've been tracking your ovulation, there's no way to know for sure exactly when you ovulated and conceived. Have you tried adding, subtracting, multiplying and counting on your fingers? Find out when your baby is due with our handy pregnancy calculator. ![]()
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