![]() ![]() We provide free limited obstetric ultrasounds to confirm pregnancy. The earlier in pregnancy that this ultrasound is performed, the more accurate the measurements will be, and the more likely you are able to determine the conception date. Early pregnancy ultrasounds can determine the age of your growing baby and when you likely conceived. The best way to determine your conception date is with a pregnancy confirmation ultrasound. Also, remember that you could become pregnant even if you or your partner used birth control, since no method of birth control is 100% effective at preventing pregnancy. This can make it difficult to determine when you conceived, especially if you have had more than one partner during the time when you ovulated. Conception is a process that takes time and a man’s sperm can actually stay alive inside your body for up to a week after sex. Unfortunately, this method isn’t totally accurate either. In other words, calculating conception based only on your body cycles can be difficult.Īnother way to learn your conception date is to try to determine the last time you had sexual intercourse. Not all women have the same cycles of menstruation and ovulation, some women’s menstrual cycles are irregular, others have ovulation periods closer to or further from their menstrual period and some women simply aren’t sure when their last period was. However, this method isn’t always accurate. This means you can sometimes determine when you conceived based on your ovulation cycles - simply determine when your last menstrual period was and add approximately two weeks. Ovulation usually occurs about two weeks after your menstrual period and lasts for two or three days. That means you can use your ovulation dates to try to determine when you became pregnant. In general, women can only conceive when they are ovulating - that is, when their ovaries release a new egg into their fallopian tubes for fertilization. The first way to find out your conception date is to determine when you were last ovulating. No method is 100% accurate, but some are more reliable than others. First, calculate current gestation using one of the other methods, then go to this section and choose a gestational age.In general, there are a few ways to determine your conception date. First, calculate current gestation using one of the other methods, then go to this section and choose past or future date.ĭate at future or past gestation: Use to calculate the date at a specific gestation (enter in weeks). Gestation at a future or past date: Use to calculate gestation in the future or past. This calculates the current gestational age and gives an estimated date of LMP.Ĭonception date: If conception is known (eg, date of insemination, ovulation or egg retrieval), then the due date can be calculated by adding 266 days. Ultrasound due date: If a due date has been calculated from an ultrasound in the first trimester, the reverse calculation method is preferred. Last menstrual period (LMP): The LMP calculation uses the standard method of the first day of your last menstrual period plus 280 days to calculate the due date. ![]() This calculator allows you to calculate the following: Use the drop-down menu to calculate your due date or current week of pregnancy. ![]()
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