Free Pregnancy Due Date Calculator

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The Pregnancy Due Date Calculator (also known as pregnancy calculator) assists moms-to-be to answer the fascinating question: when is my due date? With our tool, you will readily judge your baby due date. In the article below, you’ll read about the pregnancy due date and discover how to calculate due date using different calculation approaches (Naegele’s rule and conception date).

Calculate  Your Due Date With Our Free Pregnancy Due Date Calculator:

reverse due date calculator

Pregnancy due date

Becoming pregnant is probably one of the most memorable phrases of your complete life. Getting ready for the baby to come is extremely exciting, both for the joyful parents and for their family members and friends.

The time that the fetus grows in its mother’s uterus is known to be 280 days or around 9 months. Besides pure fascination, there are a lot of reasons why it’s worth to know the foreseen delivery date.
Pregnancy Due Date Calculator
Many choices are based on the estimation of the approximate baby due date. For instance – if to perform additional examinations, to induce labour or to prepare for the pregnancy leave. On the other hand, the estimated date of delivery is not completely accurate.

Estimated due date

An estimated due date (EDD) is a term used to estimate the most likely day when the labour may happen. Many different and often interdependent factors help determine the duration of a pregnancy, so the date is just an estimation. Only about 4% of infants are born exactly on the calculated birth date. Taking that into account, it is not possible to define the specific day of childbirth with 100% certainty.

What’s a”due month”?

The due month is a term which helps moms reduce stress and anxiety about moving past the due date. Considering that the actual proportion of babies born just in the expected due date is low, it is unrealistic to expect the due date to be accurate.

The term” due month” stands for a time frame when a baby can be anticipated at a proper gestation. Without complications, a baby is usually born between weeks 37 and 42.

Approximately 80% of infants delivered in the timespan in just two weeks prior to or after the expected due date.

To learn your due month, you may use Dr Sufis pregnancy due date calculator in the advanced mode. To calculate
it, we subtract or add two weeks to the estimated due date.
Formula: due month = due date ± 2 weeks

The way to calculate the due date?

There are a few scientifically proven approaches to estimate the pregnancy due date. Some of them are easy in concept, others are a bit more complex.
Keep in mind that all procedures only provide forecasts.

Also, remember that your due date can change. There’s not any cause for concern, your doctor may alter the due date for many reasons as your pregnancy progresses (due to irregular periods, abnormal fundal height( or abnormal levels of alpha-fetoprotein – a protein created by the baby). The due date could be defined with the following methods:

  • The Naegele’s rule (basing on the first day of your last period),
  • The exact date you conceived,
  • Mittendorf-Williams rule,
  • Doppler ultrasonography,
  • Pregnancy milestones,
  • Fundal height.

LMP – what is it?

The LMP describes the first day (beginning of bleeding) of your last menstrual period prior to getting pregnant. This date is used by our calculator to calculate the due date.

Following this method of counting, a girl is regarded as 6 weeks pregnant only two weeks after her first missed period.

Naegele’s rule

Naegele’s rule – also called “the first day of LMP method” adds 280 days (40 weeks) to the first day of your last menstrual period:
due date = first day of LMP + 280 days
It is used in most pregnancy wheels…Its accuracy depends upon the mother’s LMP first day remember and in their menstrual cycle length.

What’s more, some women experience mild bleeding at the start of the pregnancy, which is about the time when they’d normally have their span.

As a result, they may have been pregnant a few weeks sooner than they recognize. Periods aren’t necessarily exactly four weeks apart. When the cycle is more, the baby may be conceived somewhat later after the interval than assumed in the calculations. When it is shorter, the conception can happen sooner than estimated.

What is the conception date?

It happens when a sperm connects using an egg (fusion of gametes). From that instant, a zygote is splitting and growing fast, forming a new organism.

Women who monitor their childbirth carefully may understand their specific day of conception, but for the remainder of mothers, it is often very tricky to specify when they guessed.

If a woman’s menstrual periods are routine and ovulation occurs on day 14 of her cycle, conception takes place about 2 weeks after her LMP. After unprotected intercourse, sperm can live inside the vagina up to five days, and an egg can live up to 24 hours following its launch.

This provides a 6-day-timespan of the chance to become pregnant at each cycle. For example: if you had intercourse on Saturday, then there’s a chance of getting pregnant until Thursday.

Conception date Process

If you know the exact date of conception, try to use the next calculation method in the due date calculator. Our due date predictor will add 266 days (38 weeks) into the date.

This method may give you a more reliable result than the LMP method, particularly when your cycles are irregular or considerably shorter or longer than 28 days.

due date = date of conception + 266 days

When is my due date?

reverse due date calculator

How long is a pregnancy?

The duration of healthy pregnancies places between 37 to 42 weeks. There’s a 5-week time period when a baby may arrive and would be considered as born in duration.

Infants born before week 37 are considered premature and generally require extra medical care for a while. Factors such as the increase in maternal obesity and age may give rise to early births.

Childbirth after week 42 is called a lengthy pregnancy and may carry a higher risk of complications.

Multiple pregnancies, like twins and triplets, tend to be born prematurely — the greater number of the infants, the earlier they’re usually born.

The length of pregnancy may also be influenced by the length of time it took the embryo to implant following conception. Extended implantation determines more gestation from implantation to birth.

Moreover, tall women tend to have longer pregnancies than shorter women. White European women also tend to have naturally longer pregnancies than African-Caribbean or Asian women.

Pregnancy trimesters

pregnancy trimesters

Pregnancy is divided into three trimesters (each lasts 3 months). In this period of time, the prospect of a miscarriage (natural death of embryo or fetus) or a critical disability is the highest.

Within this time, your body undergoes several changes triggered by hormones. These alterations affect every organ system in your own body, and their symptoms may happen even at the very first weeks of pregnancy.

Your emotions might range from excitement to anxiety. Your period stopped – that’s a clear sign that you are pregnant. The changes may include:

  • mood swings,
  • tiredness,
  • tender, swollen breasts,
  • headache,
  • weight gain or loss,
  • need to pass urine more often,
  • constipation.

According to the American College of Obstetricians and Gynecologists (ACOG), during the first month of pregnancy, the baby’s heart and lungs start to develop.

The majority of women perceive this trimester as far better than the first one. Some of the symptoms, such as nausea and exhaustion, are moving away.

New noticeable changes to your body are now occurring. Your abdomen is still growing so for your baby, and before the trimester ends, you will start feeling the movements of your baby! Here is a few of the symptoms that you may notice during that period:

  • darkening of the skin around your nipples,
  • body aches (back, abdomen, groins, thighs),
  • stretch marks on abdomen, breasts, thighs,
  • a line on the skin going from belly button to the pubic hairline,
  • numbs or tingling hands.

The legs and arms can flex, kidneys begin working and produce urine. Baby can listen to and consume. Its fingernails, eyebrows, and throat start to form.

The skin has a wrinkled appearance. At week 28, more than 90 per cent of babies can survive outside of the uterus if high-quality medical care is provided.

The next and final trimester lasts from week 29 to delivery (which occurs around week 40). A few of the discomforts from the former trimester will still be present.

Moreover, a lot of women find breathing difficulties and they need to visit the toilet more often. This is because the baby is getting larger and puts more pressure on the mother’s organs. Those feelings may be disagreeable, but do not worry, they will go away after birth.

During the last trimester, you may find out some new body changes:

  • shortness of breath,
  • troubles with sleeping,
  • tender breasts (some of the water pre-milk, colostrum, may leak out),
  • bellybutton sticking out,
  • heartburn,
  • contractions (they may be a sign of real or false labour).

By the seventh month of pregnancy, the baby kicks and moves. It may even respond to light and sound. Eyes can open and shut. In the next month, the embryo increases weight very quickly, different areas of the brain are now forming.

At the ninth month, the baby is getting ready for birth by turning into a head-down place in a woman’s pelvis.The lungs are fully developed and prepared for working autonomously in the mother. The weight increases appreciably.

As your due date is nearer, your cervix gets thinner and thicker. It’s a natural process that aids the birth canal open during the birth procedure. The final countdown has begun…!

Premature birth

due date calculator pregnancy

The reason for premature birth is often not specified. However, there are well known risk factors for premature delivery, for example:

  • having a previous premature birth,
  • multiple pregnancies (twins, triplets, other multiples),
  • less than six months of interval between pregnancies,
  • conceiving through in vitro fertilization,
  • smoking cigarettes,
  • some infections (particularly genital),
  • chronic disorders like high blood pressure or diabetes,
  • being underweight or overweight before pregnancy,
  • stressful life situations,
  • multiple miscarriages or abortions,
  • physical injury or trauma.

The next tables show the median value of birth: weight, length and head circumference of premature babies in various gestational ages (for both boys u0026amp; girls).

For boys:

gestational ageWeight
Head circumference
40 weeks7 / 3.620 / 5113.8 / 35
35 weeks5 / 2.518.1 / 4612.6 / 32
32 weeks3 / 1.816,5 / 4211.6 / 29.5
28 weeks2 / 1.114.4 / 36.510.2 / 26
24 weeks1 / 0.6512.2 / 318.7 / 22

For girls ♀:

Gestational ageWeight
Head circumference
40 weeks7 / 3.420 / 5113.8 / 35
35 weeks5 / 2.417.7 / 4512.4 / 31.5
32 weeks3 / 1.716,5 / 4211.4 / 29
28 weeks2 / 1.014.1 / 369.8 / 25
24 weeks1 / 0.6012.6 / 328.3 / 21

Gestational age

During this time period, the baby grows and develops inside their mother’s uterus. Gestational age (GA) describes how far along is the pregnancy.

It’s measured in weeks, by the first day of a woman’s last menstrual cycle to the present date. Therefore, when a baby is conceived (ca. two weeks after LMP), it’s considered to be currently two weeks gestational age.

When should I schedule the first medical examination?

Proper medical care throughout the pregnancy is essential to guarantee that the baby is healthy and control any probable complications.

Right after you have realized that you are pregnant, you need to schedule a first prenatal appointment with your doctor. It will normally be longer than potential visits. Its purpose would be to:

  • determine your due date,
  • find out your health history,
  • explore the medical history of your family members,
  • determine if you have any pregnancy risk factors.

The evaluations you can anticipate at the first doctor appointment

The first visit intends to confirm your pregnancy using a blood test for hCG and also to ascertain your overall wellbeing.

You can expect a general along with a pelvic examination, a transvaginal ultrasound, and some laboratory tests. They are important to make certain that the pregnancy is going well and the baby is developing properly.

The doctor may advise a urine test, an Rh factor evaluation, a blood panel, sugar level, and tests for HIV, syphilis, hepatitis C, toxoplasmosis, gonorrhoea, and rubella.

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