What Is Edd In Pregnancy

What Is EDD in Pregnancy?

Pregnancy is one of the most important and unforgettable times of a woman’s life. EDD stands for estimated date of delivery (EDD). It is a date that doctors and midwives use to estimate when the baby will be born.

How is the EDD Calculated?

In order to calculate the EDD, a doctor will track the last menstrual period (LMP) of the pregnant woman and add 280 days from that date. The 280 days is the average length of a pregnancy and is referred to as gestational age. Generally speaking, it is relatively accurate but can differ slightly depending on the individual woman’s body and the size of her baby.

What Factors Affect the EDD?

There are several factors that can affect the EDD, including the following:

  • Age: As women grow older, the length of their pregnancies can increase. This can increase the EDD as well.
  • Size of the Baby: Generally, larger babies tend to spend more time in the womb and push their due date out a bit longer.
  • Fertility Treatments: Fertility treatments such as in vitro fertilization (IVF) can also affect the EDD. As the egg is fertilized in a lab and not inside the mother’s womb, the gestational age is usually shorter.

What if the EDD is Wrong?

Although the EDD is generally accurate, it is only an estimation and does not always reflect when the baby will actually be born. Most babies are born within two weeks of their due date, so doctors and midwives will generally give a range of dates that the baby may be born within. It is important to remember that the baby will come when they are ready and the EDD should be viewed as a loose guideline.


EDD, or Estimated Date of Delivery, is a date that doctors and midwives use to estimate when the baby will be born. It is based on a woman’s last menstrual period and 280 days, which is the average length of a pregnancy. Several factors such as age, size of the baby, and any fertility treatments can affect the EDD. It is important to remember that the EDD should be viewed as a loose guideline, and that the baby will come when they are ready. It is always important to discuss any questions or concerns about the EDD with your doctor or midwife.

What is EDD in Pregnancy?

EDD stands for Estimated Due Date and is used to describe the expected due date of an unborn baby. EDD is based on calculated information related to the date of a woman’s last menstrual period (LMP). It is one of the most important pieces of information used by health care providers to monitor and assess the progress of a pregnancy.

How is the EDD Calculated?

The standard calculation of the EDD is based on the first day of a woman’s LMP and assumes that she has a regular menstrual cycle of 28 days, with ovulation occurring in the middle of the cycle. The EDD is calculated by adding 280 days (or 40 weeks) to the first day of the LMP.

Why is EDD Important?

Knowing the EDD is an important part of caring for both mother and baby during pregnancy. It helps health care providers accurately assess the progress of a woman’s pregnancy and to monitor her physical and emotional health.

It is also important for tracking the course of labor. Knowing a baby’s EDD helps medical providers be prepared for the delivery and to advise the mother on when to seek medical care if labor begins or if pain or other symptoms occur.

Are There Limitations to the EDD Calculation?

The EDD calculation is generally accurate, however there are limitations to its accuracy. For instance, if a woman has an irregular menstrual cycle or does not know the exact date of her last menstrual period, the calculation may not be precise. Ultrasound is often used to confirm a pregnancy and to get a more exact due date.

Things to Know About EDD

  • Fluctuations: Although the EDD can provide an accurate estimate of when a baby is due, it is not a guarantee. Babies can arrive before or after the EDD, and on average 5% of babies are born on their EDD.
  • Checkups: It is important for women to keep up with regular prenatal checkups to monitor the health of both the mother and her baby. During prenatal checkups, the EDD may be adjusted if the health care provider confirms a different due date after a physical exam or ultrasound.
  • Preconception Care: Women should always speak to their health care provider before becoming pregnant to discuss preconception care. This includes choosing a method of contraception, taking a preconception health assessment and discussing any potential health risks that could arise during the pregnancy.

EDD is an important and helpful tool for expecting parents and health care providers. It provides an estimated date for when a baby is due, and gives health care providers a way to assess the progress and health of the mother and baby. However, it is important to remember that more accurate due date information can be obtained through ultrasound, and that the EDD should be seen as a general guide.

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