Pregnancy is a natural process that begins when an egg fertilized by sperm forms an embryo. The embryo then develops into a fetus and the baby is born.

During early pregnancy, the fetus develops major body organs such as the brain, heart, and spinal cord. It also starts growing organs and systems such as the skin, nails, and teeth.

In addition, the uterus grows, becoming larger and pressing against the rectum. This can cause constipation, gas, and stomach discomfort.

Some women experience premenstrual syndrome (PMS) during pregnancy. PMS symptoms include irritability, fatigue, and mood swings. However, it is important to note that these symptoms are common during other periods of the month and aren’t unique to pregnancy.

During the first trimester, the fetus is very vulnerable. There are many things that can damage the fetus such as tobacco, radiation, or toxic substances.

Pregnant women should not take drugs that aren’t prescribed by their doctor. Many medications for pregnancy are regulated by the Food and Drug Administration.

The amniotic fluid is made by the fetus and helps regulate the fetus’ temperature. It can be sweet, or it can taste bad.

At this stage, the fetus is about one inch long. It weighs from 0.5 to one ounce.

During the second trimester, the fetus begins to move. It is considered viable at this stage, but many babies are born before 23 weeks, and this increases the risk for health complications.

By the third trimester, the fetus has fully formed arms and legs. The intestines, kidneys, and oil glands are also developing.

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