(2013) Human Anatomy and Physiology, 5th ed. The Pregnancy Conception Calculator estimates the date of conception based on the expected due date of the pregnancy, last period date, or ultrasound date. New England Journal of Medicine 340 (23):1796–1799Ģ) Marieb EN, Hoehn K. (1999) Time of implantation of the Conceptus and loss of pregnancy. Referencesġ) Wilcox AJ, Baird DD, Weinberg CR. The conception date is a date in which a sexual intercourse takes place and it is situated at a range of a few days before and after the ovulation. The date of conception depends on the female body menstrual cycle dates as the fusion between the egg and sperm can only take place when the egg is matured and released from the ovary and this only happens half way through the menstrual cycle at a date called ovulation date. This process leads to the development of an embryo that during the pregnancy, after 38 weeks time will develop into a new born ready to be birth. This is also known as fertilization or fecundation and represents the moment of fusion between the male sperm and female egg. The first result takes into account the length of a term pregnancy while the second result relies on the distance of 14 days between the first day of the period and the ovulation time when the baby could have been conceived. Or a pregnant woman with a cycle length of 30 days and first day of last period March 5 th 2014 is likely to have conceived March 18 th 2014. Example conception calculation and resultįor instance, someone born on January 24 th 1980 is likely to have been conceived around May 3 rd 1979. This conception calculator will only ask you to input the length of the menstrual cycle and the date of the first day of the last period in order to discover this date for you. Or if you are an expectant woman you can discover when you’ve conceived your baby based on the data of your menstrual cycle. This great tool can determine the probable conception date by using simple data from the menstrual cycle or just a simple birthday, depending on what you need to find out.įor instance if you are just wondering when you were conceived you can input your birthday and discover when is it likely that your biological parents had you.

The size of your uterus, which will be noted when your initial internal pregnancy exam is performed, can also be a factor in pinpointing the EDD.How does this conception calculator work?.

Your fundal height, which is the measurement from your pubic bone to the top of your uterus, is checked by your practitioner at each prenatal visit and helps confirm your due date. Check out our online due date calculator. Some of the most important things to do when trying to get pregnant and during early pregnancy are calculating your fertile days, and finding out your due date as well as how far you are along in your pregnancy. Pregnancy milestones such as the first time the baby's heartbeat is heard (around week 9 or 10, though it can vary) and when you first feel fetal movement (on average between 18 and 22 weeks, but it can be earlier or later), can give clues as to whether your due date is accurate. Once an egg leaves the ovary, it must be fertilized within 12 to 24 hours or it’s too late. The calculator also estimates a possible range of days during which sexual intercourse might have led to conception based on sperm being viable for 3-5 days within a woman's body.

The date of conception is the day on which a person's baby is conceived.

Some practitioners perform them routinely, but others only recommend one if your periods are irregular, you're 35 or older, you have a history of miscarriages or pregnancy complications, or the due date can’t be determined based on your physical exam and LMP. The Pregnancy Conception Calculator estimates the date of conception based on the expected due date of the pregnancy, last period date, or ultrasound date. Just be aware, however, that not all women get an early ultrasound.

Even if you can’t pinpoint when you conceived, forget the day of your last menstrual period or aren’t sure when ovulation occurred, other clues can help you and your practitioner determine your due date at your first prenatal appointment, including:Īn early ultrasound, which can more accurately date the pregnancy.

Conception to due date