What Causes Morning Sickness During Pregnancy?

By on February 4, 2014

For most women, the toughest part of pregnancy in early months is morning sickness. Morning sickness, as the name suggests women experience sickness in early hours of the day.

It can also happen at any time of the day and even lasts all day for some women. It generally described as vomiting and nausea but can also include headaches and dizziness.

No one knows exactly what causes morning sickness during pregnancy, but it is probably linked to main physical changes that are taking place in your body.

Here are the five most common causes of morning sickness:

Causes of Morning Sickness During Pregnancy

1. Human Chorionic gonadotropin (HCG)

This particular hormone rises in its level rapidly during pregnancy. No one knows how HCG is linked to morning sickness and nausea, even though it is a prime suspect.

Women who have higher levels of HCG hormone can experience higher rates of vomiting and nausea.

2. Estrogen Levels

Experts believe that morning sickness is partly due to increase in circulating levels of estrogen hormone. Estrogen levels can be 100 times higher during pregnancy compared to normal women who are not pregnant.

3. Progesterone levels

When a woman is pregnant, her levels of progesterone hormone also rise. High amounts of progesterone hormone relax the uterus muscles in order to avoid early child birth.

However, it can also relax the intestine and stomach muscles, resulting in excess stomach acids that cause nausea and morning sickness.

4. A Sensitive Stomach

For some women, gastrointestinal tract is more sensitive to the changes occurring during early pregnancy. Some research shows that women with stomach bacteria called Helicobacter pylori are more prone to develop vomiting and nausea.

5. Sense Of Smell

During pregnancy, women can experience increased sensitivity to odors, which can over stimulate common nausea triggers.

  • Smell of some strong tasting vegetables and meats, which are likely to contain food borne microbes can induce vomiting and nausea.
  • Smell of cigarettes and alcohol can also trigger morning sickness.

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