Use this pregnancy calculator to estimate your due date, see how many weeks pregnant you areand find out your probability of giving birth on certain dates. The estimated due date (EDD or EDC) is the date that spontaneous onset of labor is expected to occur. The due date may be estimated by adding days (9 months and 7 days) to the first day of the last menstrual period (LMP). Ultrasound uses the size of the fetus to determine the. A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy.
Do you have an enquiry or suggestion? The estimated date of delivery (EDD) pregnancy calculator equation parameters include current date, last menstrual period, ultrasound date, and gestational. Because the human egg is capable of fertilization for only 12 to 24 hours after ovulation the date of ovulation may be taken as being the date of conception.
Every pregnant woman wants to know her due dateand a due date that is calculated from her last menstrual period with a due date calculator often doesn't match the due date that is estimated by her first ultrasound also known as a sonogram. Use the due date caculator by Flo to determine your pregnancy due date using ultrasound results. Pregnancy lasts an average of days 40 weeks from the first day of your last menstrual period LMP.
Most pregnancies last around 40 weeks or 38 weeks from conceptionso typically the best way to estimate your due date is to count 40 weeks, or days, from the first day of your last menstrual period LMP. Another way to do it is to subtract three months from the first day of your last period and add seven days. So if your last period started on April 11, you'd count back three months to January 11 and then add seven days, which means your due date would be January Calculating your due date based on the first day of your last period works well for women who have a relatively regular menstrual cycle.
Right now there is a lone egg and a whole bunch of anxious sperm eager to fertilize the egg. This pregnancy due date calculator will give you a rough idea of when your baby last menstrual period (LMP), or have already had your first ultrasound scan. Enter your email address and we'll send you a link to reset your password.
Professional Reference articles are designed for health professionals to use. Notes. This calculator gives you many options for estimating gestation and delivery dates. Input any or all parameters to compare the various date calculations.
Jan 16, Sometimes the due dates estimated by an early ultrasound don't match the menstrual period with a due date calculator often doesn't match the due date that As the pregnancy progresses, the accuracy of an ultrasound for.
An early ultrasound, which can more accurately date the pregnancy. Just be aware, however, that not all women get an early.