5 Serious Causes Of Nausea And Vomiting During Pregnancy

causes of nausea and vomiting during pregnancy

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Pregnancy and morning sickness go hand in hand for most women. Few lucky would-be-moms never have to go through this uneasiness, thanks to their genes. Though the unpleasant interference of nausea in daily routine affects most of the pregnant women, they are not at all harmful to the fetus.

Do Morning Symptoms Occur Only In The Morning?

Ironically, morning sickness is just a misnomer for the clinical term used for the symptoms of vomiting and nausea during pregnancy. Even though, the symptoms can affect the pregnant women at any time of the day, it is still called morning sickness. [1]

Some facts related to the same:

  • More often, the feeling of nausea is at its peak when you wake up for the first time in the morning.
  • In rare cases, these symptoms last all through the day causing frequent disruption in daily routine.
  • More than half of the pregnant women suffer from morning sickness.
  • Studies suggest that three out of every 10 women suffer from nausea and vomiting in the
    first trimester of their pregnancy.2
  • Most of the women suffer from both vomiting and nausea. There are only few pregnant women who suffer from either nausea or vomiting.
  • The symptoms and intensity can vary according to health, eating habits and genetic influence.
  • The symptoms usually start in the sixth pregnancy week, but in rare cases may also begin in the fourth week.
  • Women usually suffering from morning sickness get complete relief in the 14th to 16th week. In very rare case, the symptoms continue until the time of delivery.

[ Read: Vomiting During Pregnancy ]

5 Causes Of Vomiting And Nausea During Pregnancy:

Until now, no single sure cause of nausea and vomiting during pregnancy has been traced. Still, doctors, believe that the different physical changes taking place in the body, mostly due to hormonal disruption, lead to morning sickness problem. Here are some of the possible causes:

1. Rise In The Hormone HCG:

Human chorionic gonadotropin or HCG is a hormone that increases very fast during the first quarter of pregnancy.

  • Although no direct connection between this hormone and nausea has been established until now. Clinical observations indicate that the problem of morning sickness peaks when the level of HCG are high.
  • Moreover, in case of multiple pregnancies where the levels of HCG are naturally high, the problem of vomiting and nausea is also very much severe.

2. Increase In Estrogen:

Estrogen level rises during pregnancy. This also contributes in some way in increasing the symptoms of morning sickness.

3. Increase In Odor Sensitivity:

During the first trimester of pregnancy, women usually have an increased sensitivity towards particular odor or smell. Nausea is usually triggered off by such odors that contribute to the increased estrogen levels.

4. Stomach Is More Sensitive:

During the first quarter of pregnancy, the gastrointestinal tracts of pregnant women are very sensitive.

  • Due to the presence of bacterium known as Helicobacter pylori in women, the symptoms of morning sickness are more severe.
  • Although no direct link has been established between the bacterium and the gravity of symptoms.

5. Psychological Response:

According to some researchers, some women suffer from morning sickness symptoms due to stress or psychological predisposition.

Adverse Effects Of Morning Sickness:

In some women, the symptoms of morning sickness can be quite severe and can lead to a very serious condition termed as hyperemesis gravidarum or HG.

  • This type of problem requires special treatment and the affected pregnant women needs to be hospitalized for complete cure.
  • The symptoms of nausea and vomiting in this case are so severe that the system of pregnant woman cannot retain a single bite of food.
  • This can lead to dehydration, low blood pressure and other serious health problem – Ketosis.3
  • Severe morning sickness symptoms can cause adverse effect on the daily routine and working of many women, disturbing the quality of life.

[ Read: Dehydration During Pregnancy ]

7 Causes Of Severe Nausea In Few Women:

The symptoms of morning sickness are more in few pregnant women. Some of the causes include:

1. Multiple Pregnancies:

The nausea and vomiting symptoms are quite severe in women expecting multiples, although this is not always definite.

2. History Of Nausea And Vomiting:

In case you suffered from morning sickness in your first pregnancy, chances of increased symptoms of nausea in the next term is more.

3. Side Effects Of Birth Control Pills:

In some women, morning sickness is also caused as a side effect of using birth control pills in excess. Due to long-term use of these pills, the estrogen levels in the body increase leading to nausea.

[ Read: When To Stop Taking Birth Control Pills ]


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