Why Women Experience Morning Sickness

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Morning sickness is one of the most common side effects of a pregnancy. Almost all pregnant women experience the nausea and vomiting of morning sickness at some point and to some degree or another during their pregnancies.

The symptoms are usually the worst in the morning (hence the name) and may wear off throughout the day or can last all day long. For most women, morning sickness starts during the first trimester of pregnancy and may last from a few weeks to the end of pregnancy.

Why Does Morning Sickness Happen?

There is no absolute proof as to what causes morning sickness, but doctors have guessed that it is a result of the physical changes that occur in a pregnant woman's body. The most likely cause is the increase in hormones that they experience. Their estrogen levels rise quickly during the first few months of pregnancy, which can be difficult to adjust to.

The human chorionic gonadotropin hormone (more commonly referred to as hCG) also rises quickly at the same time, and studies have shown that women with higher levels of this hormone typically experience harsher feelings of sickness. In addition to these hormones, pregnant women tend to be more sensitive to the smells around them, which can also trigger nausea and vomiting. Odors that did not bother these women before getting pregnant can suddenly make them feel sick.

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