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Bizarre Scientific Facts About Pregnancy

APRIL 1, 2015  —  By Spencer Montgomery

1. The longest known pregnancy lasted for a year and 10 days. 

The longest known pregnancy lasted for a year and 10 days. 

2. Amniotic fluid is mostly just urine.

By the time baby is ready to be born, it will be consuming up to 15 ounces of amniotic fluid a day.

3. Strong flavors pass through amniotic fluid, meaning babies in the womb really can taste what their mother eats.

Strong flavors pass through amniotic fluid, meaning babies in the womb really can taste what their mother eats.

4. Pregnant women only need about 300 extra calories a day.

Pregnant women only need about 300 extra calories a day.

5. There are more twins in Central Africa than anywhere else in the world.

There are more twins in Central Africa than anywhere else in the world.

6. Around the world, one woman dies every 90 seconds from pregnancy or childbirth.

Read the Amnesty International report here

7. Pregnant and nursing mothers can lactate automatically when they hear a baby crying.

Pregnant and nursing mothers can lactate automatically when they hear a baby crying.

8. Breastfeeding has nothing to do with nipple or breast size.

Breastfeeding has nothing to do with nipple or breast size.

9. There is a 15-year-old girl who got pregnant from oral sex, a knife fight and a sperm spill.

The crazy story in short: this girl from Lesotho without a vagina conceived after she she performed oral sex and was then stabbed in the stomach. It's assumed some sperm met the reproductive organs via the injured gastrointestinal tract. The full story can be found here. r-old girl who got pregnant from oral sex, a knife fight and a sperm spill.

10. It's true: if you have heartburn badly during your pregnancy, your baby is more likely to be born with a full head of hair. 

It's true: if you have heartburn badly during your pregnancy, your baby is more likely to be born with a full head of hair. 

11. Babies cry in the womb.

Babies cry in the womb.

12. Orgasms can cause "practice contractions."

Orgasms can cause "practice contractions."

13. After the second trimester, babies start peeing in the uterus. 

After the second trimester, babies start peeing in the uterus. 

14. A woman's uterus expands to the size of watermelon in the third trimester.

A woman's uterus expands to the size of watermelon in the third trimester.

15. Having a baby boy can increase the mother's risk of autoimmune diseases and forgetfulness.

Having a baby boy can increase the mother's risk of autoimmune diseases and forgetfulness.

16. One in every 2,000-3,000 babies is born with a tooth.

One in every 2,000-3,000 babies is born with a tooth.

17. A woman can get pregnant while she is already pregnant.

There are 10 reported cases of this happening. However, Dr. Atlas assures women the phenomenon is very rare and isn't a cause for any concern.

18. A baby starts making its first poo at about 21 weeks' gestation.

A baby starts making its first poo at about 21 weeks' gestation.

19. Nipple stimulation is the only proven method of bringing on labor. 

Nipple stimulation is the only proven method of bringing on labor. 

20. When a woman nears the end of her pregnancy, her placenta produces more estrogen than a non-pregnant woman's in three years.

When a woman nears the end of her pregnancy, her placenta produces more estrogen than a non-pregnant woman's in three years.

21. Hormonal changes can cause pregnant women to shed their hair or grow a lot more of it.

Hormonal changes can cause pregnant women to shed their hair or grow a lot more of it.

22. Recently, a woman gave birth to a 15-pound baby.

This baby didn't take the World Record for heaviest baby born though; that record belongs to a 23-pound baby born in 1879.Meet 15-pound Andrew Jacob:

23. The majority of pregnant women will experience darkening of the skin, known as the face "mask" of pregnancy, or melasma.

The majority of pregnant women will experience darkening of the skin, known as the face "mask" of pregnancy, or melasma.

24. Blood flow increases during pregnancy, meaning so do nose bleeds and bleeding gums.

Blood flow increases during pregnancy, meaning so do nose bleeds and bleeding gums.