Pregnancy gives you the license to eat whatever you want, whenever you want, right? Not so fast. A pregnant woman needs only about 300 extra calories a day to feed her growing baby, according to KidsHealth.

Although pizza can in fact be healthy during pregnancy, there are healthier choices and limits to how much of it you should eat. On average, as a pregnant woman you only need about 300 extra calories per day, even if your appetite is suggesting otherwise.

It has been estimated that a pregnancy requires about 80,000 calories above a woman's normal intake. Averaged throughout the 40 weeks of pregnancy, this is roughly 300 calories more per day, though you may find you need less in the first trimester and more in the third.

Water retention occurs when fluid is held in the body, rather than being released as urine. Water retention can make you feel bloated and can occur in the legs, abdomen, ankles, breasts, fingers and even underneath the eyes.

Menstrual cycles are controlled from beginning to end by hormones. Different female hormones are responsible for recruiting, maturing and releasing oocytes, or eggs, so they're ready to be fertilized by sperm.

Eating for two may not seem difficult, but for many women gaining enough weight during pregnancy can be a challenge.

A tilted uterus is a normal anatomical variation that affects 20 percent of all women. Normally, the uterus is located straight up and down, or tips slightly forward, however, in retroversion of the uterus, the uterus tilts backwards at the cervix.

The menstrual cycle of a fertile woman is caused by hormones. During this time, the ovaries and the uterus react to hormones such as estrogen and progesterone that are controlled by the pituitary gland and the hypothalamus.

The Fallopian tubes are two narrow tubes that connect your ovaries and uterus, and are the sites where an egg becomes fertilized. If your tubes are blocked, you may experience infertility.

After discontinuing breastfeeding, it is not uncommon to experience pain in your breasts for several days or longer. Engorgement, plugged ducts and mastitis are painful complications of weaning, especially abrupt weaning.

Trying to get your body to conform to a particular shape can be a losing proposition as body ideals change from decade to decade. Contrast the curvy 1950s with the skinny 1960s, and you can see how the body image that was ideal before suddenly fell out of fashion.

While it might feel awkward and could throw off your balance, bending over in the last three months of pregnancy will not hurt you or your baby in any way. Your baby is well protected by the abdominal wall and muscles, the uterine wall -- which is also composed of muscle -- and the amniotic fluid around him.