Or to be more precise, a woman has 3.3 percent chance of conceiving twins naturally. By naturally, we mean without any kind of fertility treatment.

Newborn babies are experiencing a totally new environment. The feelings, noises, and sights are entirely new to them, which can be uncomfortable and unsettling. However, things they do recognize are the sounds of his or her parent’s voices, and the feeling of being held, similar to when they were snug in the womb. Holding your baby and speaking to your baby will help to teach him or her how to regulate their own emotions and calm themselves down.

The amount of blood in your body will rise dramatically during pregnancy. By the time you give birth, you'll have about 50 percent more blood circulating than usual.

Two crucial nutrients, folic acid and iron, are always included in prenatal vitamins because most pregnant women don't get enough of them from food alone.

Avoid exposure to toxic substances and chemicals, such as cleaning solvents, lead and mercury, some insecticides, and paint. Pregnant women should avoid exposure to paint fumes.

Endometriosis occurs when tissue that normally grows in the uterus implants and grows in other locations. This extra tissue growth — and the surgical removal of it — can cause scarring, which may obstruct the tube and keep the egg and sperm from uniting.