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 since your last period. Conception is a process and takes time, and a man’s sperm can stay alive inside your body for up to 72 hours after sex. IntercourseĪnother way to learn your conception date is to try to determine the last time you had sexual intercourse. Unfortunately, this method isn’t totally accurate either. In other words, calculating conception based just on your body cycles can be difficult. Some women simply aren’t sure when their last period was. Others have ovulation periods closer to or further from their menstrual period. Some women’s menstrual cycles are irregular. Not all women have the same cycles of menstruation and ovulation. However, this method isn’t always accurate. A pregnancy conception calculator does not only predict when you may have become pregnant, it can also calculate your due date by adding 266 days (38 weeks) to the date of your ovulation or fertilisation. This means you can sometimes determine when you conceived based on your ovulation cycles – in general, determine when your last menstrual period was and add approximately two weeks. You can enter your due date and the conception calculator will calculate possible dates of when you fell pregnant. To arrive at your baby due date, count forward 40. If you have an average-length cycle (about 28 days), your period came about two weeks before you ovulated and conceived. Ovulation usually occurs about two weeks after your menstrual period. 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. In general, women can only conceive when they have ovulated – 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. Your estimated due date is commonly calculated by. Use this calculator as a rough estimate for a due date until you have a sonogram by entering in the first day of your last menstrual period. Your due date, also known as your estimated date of delivery, is the approximate date your labor might begin. In general, there are a few ways to determine your conception date.
#Due date calculator based on conception date free#
To schedule your free obstetrical ultrasound at Embrace in Wichita, KS, call (316) 945-9400 or text (316) 530-1009 today. Ultrasounds provide a detailed look at your baby’s development and give a good estimate of when you conceived and when you are due.
Effects of Maternal Age and Age-Specific Preterm Birth Rates on Overall Preterm Birth Rates - United States, 20.The most accurate way to estimate when you conceived or how far along your pregnancy is, is with an ultrasound. DOI: 10.1093/humrep/det297.Ĭenters for Disease Control and Prevention. Estimated Date of Conception: (36 weeks 5 days or 9 months) This is based on the cycle length provided, not an average cycle length of 28 days, however it is still an estimate. Length of human pregnancy and contributors to its natural variation. Jukic AM, Baird DD, Weinberg CR, McConnaughey DR, Wilcox AJ. August 6, 2013.Īmerican College of Obstetricians and Gynecologists. Length of Human Pregnancies Can Vary Naturally by as Much as Five Weeks. Dating of Pregnancy in First versus Second Trimester in Relation to Post-Term Birth Rate: A Cohort Study.
Näslund Thagaard I, Krebs L, Lausten-Thomsen U, Olesen Larsen S, Holm JC, Christiansen M, Larsen T. Determination of Gestational Age by Ultrasound.