Expected Date of Delivery (EDD)

Expected Date of Delivery (estimated due date) (EDD) or simply due date, is a term describing the estimated delivery date for a pregnant woman. Normal pregnancies last between 37 and 42 weeks. Using this calculator, you can quite easily determine the day the baby will be born, knowing the date of the last period. Simply enter the day of your last period and the length of your menstrual cycle and the pregnancy calendar will show you all of the important information.

At a Glance

  • The first day of the most recent menstruation is considered to be the start and the delivery date to be the end of the 40 weeks of pregnancy.
  • To calculate the delivery date, add 281 days to the first day of the last period.
  • Statistically speaking, only 5.54% of children come into the world on the calculated date of delivery. That means that 94.46% of children are not born on the calculated date. 90% of kids are born up to two weeks after or up to three weeks before the calculated birth date.

How is my due date calculated?

Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle).

Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. If you deliver on your due date, your baby is actually only 38 weeks old, not 40.

Your due date is only an estimate

Please remember that your due date is only an estimate. Every pregnancy is unique and your baby will come when it’s ready. Be sure to talk to your health care provider about your due date.

On average only 5% of births take place exactly on the estimated due date. Most are born within a week either side of the estimated due date. A normal pregnancy can last anywhere between 38 and 42 weeks.

Each due date report contains the following data:

  • Estimated Due date
  • Conception Date
  • Baby Status (Size, Weight, Heartbeat)
  • Due Dates for Multiples (Twins, Triplets, Quads)
  • Trimester Stages
  • Prenatal Testing Dates
  • Timeline of Significant Milestones in Embryo/Fetal Development
  • Imagine, Your Baby Will…
  • Fun Due Date Facts
  • Famous People Born on The Due Day
  • The Due Day In History

Sample Due Date Report

Due Date Calculator Report For Friday, September 07, 2018

Note: This is a sample report, if you want to calculate your own due date

Your baby’s estimated due date is on or around
Friday, september 07, 2018

  • Conception likely took place on december 15, 2017.
  • You are 30 weeks and 2 days pregnant. (Fetal age: 28 weeks and 2 days)
  • The baby will be born during summer time.
  • You are in the third trimester.
  • The first trimester began on december 01, 2017.
  • The second trimester (weeks 13-27) began on march 02, 2018.
  • The third trimester (weeks 28-40) began on june 15, 2018.
  • Your safe range to give birth: august 17, 2018 to september 21, 2018 (full term).

212 days have passed since the start of your pregnancy. There are 68 days left until your due date.

76% of your pregnancy is completed.

First Trimester Second Trimester Third Trimester

What else is in this report?

  • Baby Status
  • Multiples – Due Dates by Average Gestation
  • Trimester Stages
  • Significant Milestones
  • Weekly Development Progress
  • Development Videos
  • Ultrasound Videos
  • Prenatal Testing Dates
  • Imagine, Your Baby Will…
  • Fun Due Date Facts
  • It’s been…
  • Famous People Born on This Day
  • On This Day In History
  • Pregnancy Timeline

Baby Status

Crown to Heel Length Weight Heart Rate Total Heartbeats
16.18 inches
41.1 cm
3.31 pounds
1502 grams
110-180 bpm 38,359,800 beats
since conception

Multiples – Due Dates by Average Gestation

Twins Triplets Quads
August 17, 2018
37 weeks
July 20, 2018
33 weeks
July 13, 2018
32 weeks

Trimester Stages

Type Second Trimester Third Trimester
By Development March 02, 2018 June 15, 2018
By Gestation March 04, 2018 June 05, 2018
By Conception March 14, 2018 June 11, 2018

Significant Milestones in Embryo/Fetal Development

Description Date Week
Your baby is conceived December 15, 2017 Week 2
Positive pregnancy test December 29, 2017 Week 4
Organs begin to form, heart starts beating January 05, 2018 Week 5
Major organs have formed, heart can be heard February 09, 2018 Week 10
Second trimester, risk of miscarriage decreases February 23, 2018 Week 12
Now is a good time to announce your pregnancy March 09, 2018 Week 14
Your baby can now see light March 16, 2018 Week 15
Your baby’s gender is visible on ultrasound March 23, 2018 Week 16
You can feel your baby move around April 06, 2018 Week 18
Your baby can now hear sounds April 13, 2018 Week 19
Premature babies have a chance to survive May 11, 2018 Week 23
Third trimester, your baby can breathe June 08, 2018 Week 27
Fingernails and toenails have formed July 13, 2018 Week 32
Your baby is now considered full term August 17, 2018 Week 37
Your baby is due any time now! September 07, 2018 Week 40

Weekly Development Progress

Baby is very close to his or her delivery length now and shouldn’t get too much longer before the birth, which is great news for your cramped uterus. On the other hand, your baby still has quite a bit of weight to put on, so don’t think your ever increasing waistline stops here! Baby now weighs around about 3 lbs and is preparing for the next big growth spurt.

Baby is still getting all of the essential nutrients for growth from you via the placenta, and with this growth spurt on the horizon he or she will be going to town on your supplies. All these nutrients are going to help Baby put on even more layers of fat and as this happens the skin continues to smooth out giving that totally delicious “soft baby skin” feel!

As you’ll know, growing a baby is hard work, and it’s even harder being the one doing the growing! You may notice your baby having longer or more structured nap times now as he or she summons the energy to do all this growing. You may also notice that when Baby’s awake they certainly make your aware of it! Now’s a good time to start tracking your baby’s movements.

Your baby is practically perfect at this point. He or she has hair covering the head and eyebrows, finger and toenails, and limbs and organs all in the right places. Of course, the brain is developing all the time, and your baby’s senses are heightening constantly, but the only further development that is important before birth is of the lungs.

Prenatal Testing Dates

Test From To
Blood/Urine Test First Prenatal Exam
Chorionic Villus Sampling (CVS) February 09, 2018 March 02, 2018
First Trimester Screen February 16, 2018 March 02, 2018
Amniocentesis March 09, 2018 April 20, 2018
Cordocentesis March 30, 2018
Quad Screen March 23, 2018 April 06, 2018

Imagine, your baby will:

  • Start walking between june and december 2019 (9 to 15 months).
  • Start potty training around march 2020 (18 months).
  • Start kindergarten in 2023 (5 to 6 years).
  • Loose a first baby tooth in 2024 (6 to 7 years).
  • Speak fluently in 2024 (6 years).
  • Start middle school in 2027 (9 to 10 years).
  • Become a teenager in 2031 (13 years).
  • Start high school in 2032 (14 to 15 years).
  • Be old enough to drive in 2034 (16 years).
  • Reach adulthood, voting rights and finish high school in 2036 (18 years).
  • Graduate from college around 2040 (22 to 23 years).

Fun Due Date Facts

  • Zodiac sign: Virgo
  • Your baby will be born in the Chinese year of the dog.
  • Half Birthday: March 07, 2019 (6 months old)
  • This time next year your baby will be 42 weeks old!
  • Your baby will be born in the 4th most popular birthing month.
  • According to Mother Goose, Friday’s child is loving and giving.
  • Birthstone: Sapphire
  • Birth Flower: Morning glory/Aster (US) or Aster/Forget-me-not (UK)
  • Birth Tree: Weeping Willow, the Melancholy
  • Birth Color: Aqua
  • Life path number: 9
  • Moon Phase: Waning Crescent Moon
  • First ever fortune cookie: The current year will bring you much happiness.

It’s been…

  • 30.3 weeks
  • 212 days
  • 5087 hours
  • 305220 minutes
  • 18313200 seconds

since the start of your pregnancy

  • 9.7 weeks
  • 68 days
  • 1632 hours
  • 97920 minutes
  • 5875200 seconds

to go until conception

  • By Christmas 2018, baby will be 15 weeks and 4 days old.
  • By New Year’s Day 2019, baby will be 16 weeks and 4 days old.
  • By Valentine’s day 2019, baby will be 22 weeks and 6 days old.

Famous People Born on this Day

  • Paul Brown (American football coach and executive) was born in 1908.
  • Sonny Rollins (American jazz saxophonist) was born in 1930.
  • Buddy Holly (American singer (The Crickets)) was born in 1936.
  • Gloria Gaynor (American disco singer) was born in 1949.
  • Chrissie Hynde (American guitarist and singer (The Pretenders)) was born in 1951.
  • Shannon Elizabeth (American actress) was born in 1973.

On This Day In History

  • 1922 – In Aydin, Turkey, independence of Aydin, from Greek occupation.
  • 1906 – Alberto Santos-Dumont flies his 14-bis aircraft at Bagatelle, France for the first time successfully.
  • 1979 – The Entertainment and Sports Programming Network, better known as ESPN, makes its debut.
  • 1901 – The Boxer Rebellion in China officially ends with the signing of the Boxer Protocol.
  • 1907 – Cunard Line’s RMS Lusitania sets sail on her maiden voyage from Liverpool, England to New York City.
  • 1986 – Desmond Tutu becomes the first black man to lead the Anglican Church in South Africa.
  • 1986 – Gen. Augusto Pinochet, president of Chile, escapes attempted assassination.
  • 1988 – Abdul Ahad Mohmand, the first Afghan in space, returns aboard the Soviet spacecraft Soyuz TM-5 after 9 days on the Mir space station.
  • 1920 – Two newly purchased Savoia flying boats crash in the Swiss Alps en-route to Finland where they would serve with the Suomen Ilmavoimat, killing both crews.
  • 1909 – Eugene Lefebvre (1878–1909), while test piloting a new French-built Wright biplane, crashes at Juvisy, France when his controls jam. Lefebvre dies, becoming the first ‘pilot’ in the world to lose his life in a powered heavier-than-air craft.

Pregnancy Timeline

First Trimester Second Trimester Third Trimester
Week 1: December 08, 2017 Week 13: March 02, 2018 Week 28: June 15, 2018
Week 2: December 15, 2017 Week 14: March 09, 2018 Week 29: June 22, 2018
Week 3: December 22, 2017 Week 15: March 16, 2018 Week 30: June 29, 2018
Week 4: December 29, 2017 Week 16: March 23, 2018 Week 31: July 06, 2018
Week 5: January 05, 2018 Week 17: March 30, 2018 Week 32: July 13, 2018
Week 6: January 12, 2018 Week 18: April 06, 2018 Week 33: July 20, 2018
Week 7: January 19, 2018 Week 19: April 13, 2018 Week 34: July 27, 2018
Week 8: January 26, 2018 Week 20: April 20, 2018 Week 35: August 03, 2018
Week 9: February 02, 2018 Week 21: April 27, 2018 Week 36: August 10, 2018
Week 10: February 09, 2018 Week 22: May 04, 2018 Week 37: August 17, 2018
Week 11: February 16, 2018 Week 23: May 11, 2018 Week 38: August 24, 2018
Week 12: February 23, 2018 Week 24: May 18, 2018 Week 39: August 31, 2018
Week 25: May 25, 2018 Week 40: September 07, 2018
Week 26: June 01, 2018 Week 41: September 14, 2018
Week 27: June 08, 2018 Week 42: September 21, 2018

Calculated Based on

The above information was calculated based on the following submitted information:

  • Start of your latest menstruation: december 01, 2017
  • Average length of your cycle: 28
  • Luteal phase length: 14

This was a sample report

It’s important to know that only 5% of all pregnancies occur on the predicted due date.

Determining a baby’s sex

Many parents would like to know their children’s sex before birth. However, in the first few weeks of pregnancy, it is hardly possible to determine sex since all embryos look alike.

At this stage, embryos display a kind of bud, a sort of bulge (protuberance). For offspring, the female body starts to produce distinct hormones, beginning with the 8th week of pregnancy.  The bud develops into a penis or a vagina. But the formation of the sex organs is a slow process. It is only after the 12th week that it is even possible to identify the sexual organs. But predictions at this point in time are still rather uncertain. Even very experienced sonograph specialists using the best ultrasound equipment have a success rate of only about 68%. If the baby is lying incorrectly or has rolled itself up or is moving or if the sexual organ has only developed slightly, the success rate is even lower.

The best time to determine sex is by means of ultrasound in the 20th week of pregnancy. Then it is fairly simple to determine the sex since the sexual organs are clearly developed.

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