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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
![Many African Americans are trying to get in closer contact with their roots. To do this, some use ...](https://biology-forums.com/gallery/27/medium_660366_14_04_17_2_13_59_277551250.png)
![Many Native Americans have maintained continuous identity with their tribal roots. You can see the ...](https://biology-forums.com/gallery/27/medium_660366_14_04_17_2_13_59_277571380.png)