Use this due date calculator to better estimate when your baby will be born!
How is my due date calculated?
The average length of human gestation is 280 days, or 40 weeks, from the start of the last menstrual period (LMP). The LMP is used as a starting point for pregnancy because it is the most recent day that is known with certainty. From the LMP, count forward 280 days to calculate a due date. You can use the pregnancy due date calculator above to see your estimated due date based on date of your last menstrual period.
What is my date of conception?
Your conception date is the day on which you become pregnant. It is the day that your egg is fertilized by a man’s sperm.
What is my LMP or last menstrual period?
This is the first day of your menstrual cycle. It is the date of your last menstrual period, the day you start bleeding, and it is the day that your body prepares for ovulation. Ovulation is when an egg is released from your ovaries. The egg travels through the fallopian tubes to the uterus, where it can be fertilized by a man’s sperm. If the egg is not fertilized, it will be shed along with the lining of the uterus during your next menstrual period.
How do I calculate my due date if I had IVF?
If you had in vitro fertilization (IVF), your doctor can calculate your due date based on the age of your embryo and the date of your transfer. This is why it’s important to have accurate information about your ivf transfer date, when your egg was retrieved and when your embryo was transferred.
How accurate is the pregnancy calculator?
Your due date is an estimate of when you will give birth. It is not an exact science, and it is not always accurate. The due date can be affected by many factors, including your health, weight, age and the length of her menstrual cycle. It is important to remember that a due date is only an estimate.
How likely am I to go into labor on the baby’s due date?
There is no definitive answer to this question since every pregnancy is unique and labor can occur any time from 37 weeks onwards. That said, studies suggest that only a small minority of women (5-10%) will actually give birth on their due date. So, if your baby’s due date is fast approaching, it’s more likely that you will go into labor a few days before or after
Can the due date change?
Yes, your actual birth due date can change. Many babies are born before or after their estimated due date.