When Does Morning Sickness Start, End, Stop, Peak, Occur, Begin, Kick In, Go Away, Subside, Get Better or Worse? How Early or Soon?


When does morning sickness usually start, peak or end? This is a very frequent question from many people, especially pregnant women.  Probably it is elicited by the fact that different pregnant women experience morning sickness symptoms at different times and hence get different opinions when they compare notes. Although there is a general pattern of occurrence of morning sickness, it is actually not the case for every woman.  As the name suggests, it is expected that the symptoms should occur or be severe in the morning but mild or absent during the rest of the time of the day, including night. On the contrary, this is actually not always the case.

What Is Morning Sickness? Definition & Meaning

Morning sickness refers to the symptoms of pregnancy experienced by a pregnant woman that entails nausea or vomiting, or both. It is medically known as nausea and vomiting of pregnancy (NVP), due to the typical symptoms that constitute it and the fact that they are experienced during pregnancy.

Morning sickness only refers to these symptoms (nausea and/or vomiting) when they are attributed to pregnancy and not any other cause. This is because a pregnant woman may still experience these symptoms when they are actually caused by other health problems rather than her pregnancy.

As such, morning sickness is only diagnosed properly when all other possible causes of these symptoms are ruled out. Nevertheless, when a pregnant woman experiences nausea and vomiting, it is almost always certain that they are as a result of her pregnancy but this still leaves a small room for other possible health causes.

Of all pregnant women, morning sickness affects approximately 70-80% to various extents. Whereas some of them tend to experience morning sickness symptoms intensely, others only experience them mildly. Also, about 60% of pregnant women experience both vomiting and nausea while the rest experience only nausea.

The other symptoms of morning sickness include fatigue or tiredness. These are actually secondary symptoms which result from the effects of nausea and vomiting. A severe form of morning sickness is known as hyperemesis gravidarum. Beside intense and continued nausea vomiting, it usually results in weight loss. Hyperemesis gravidarum affects about 1.6% of pregnant women.

When Does Morning Sickness Occur or Happen?

Despite its name, morning sickness can occur any time of the day. That is why the name ‘morning sickness’ is sometimes considered not appropriate. It can occur at night or at any time of the day, including morning, noon or evening. However, the time the symptoms arise or intensify vary from one pregnant woman to another.

Then why is it called morning sickness? Typically, for most women, the symptoms of morning sickness tend to occur or worsen in the morning but are mild or absent during the rest of time. Probably, this is why it was give this name with an intention of emphasizing when the symptoms are likely to occur or intensify rather that when they actually occur.

In terms of pregnancy stages, morning sickness typically occur between week 4 and week 16 of pregnancy. However, the symptoms of morning sickness may actually occur for lesser period in some women and almost during the whole pregnancy for others.

When Does Morning Sickness Start, Begin or Kick in?

Morning sickness starts occurring at different stages of pregnancy for different women. However, it typically begins in at 4 weeks of pregnancy i.e. since conception, which is about 2 weeks after a missed period. In terms of months, morning sickness start at the beginning of the second month of pregnancy. Nonetheless, it may still begin earlier or later than this typical time for a smaller percentage of women.

When does morning sickness start with twins? Apparently, when morning sickness stars is not influenced by being pregnant with twins. Rather, a pregnancy with multiples is likely to cause stronger symptoms of morning sickness (nausea and vomiting). Probably, this is because pregnancy hormones, which are responsible for the early symptoms of pregnancy, are at higher levels in a twin or multiple pregnancy as compared to single baby pregnancy.

How Early or Soon Can You Get Morning Sickness?

For a small percentage of women, about 10%, morning sickness can begin quite soon after conception. They begin to experience the symptoms of pregnancy earlier than the usual time.  Statistically, some of those who experience early morning sickness start to get nausea as early as three weeks after conception and yet others experience them as early as two weeks after conception. Therefore, morning sickness can be one of the early symptoms of pregnancy in some women who start having nausea soon after pregnancy

When Does Morning Sickness Peak or Get Worse?

Just as with starting and ending, morning sickness get worse at different stages of pregnancy for different women. In general, morning sickness typically peaks at week 12 of pregnancy, which is about 10 weeks after pregnancy. However, for some women, it can reach the peak earlier or later than the stated time.

Although the time morning sickness peaks may be related to how early or late it started in some women, it is not always the case. As such, it can get worse early even when it began later and vice versa. Generally, morning sickness is not a respecter of typical timelines and patterns. You may not be able to predict how the symptoms will turn out from recent occurrences.

When Does Morning Sickness Subside or Get Better?

There is no specific time when morning sickness ease up. However, morning sickness symptoms tend to get better at 14 weeks of pregnancy. Again this may vary from one pregnant woman to another, as the symptoms may subside earlier for some women but later for others.

After starting to ease up, the symptoms usually get better and better until they stop at 16 weeks of pregnancy. However, in some cases, the symptoms may start subsiding but get worse again. But such occurrences are rare and hence are not expected to happen in most pregnant women.

When Does Morning Sickness End, Stop or Go Away?

As with starting, morning sickness end at different stages of pregnancy for different women. Typically, pregnant women stop experiencing morning sickness at 16 weeks of pregnancy, which is about 14 weeks after a missed period. In terms of months, morning sickness normally goes away at the end of four months of pregnancy. Still, it may end or earlier or later than this time for some smaller percentage of pregnant women.

How Late Can Morning Sickness End or Stop?

A smaller percentage of pregnant women, about 10%, continue experiencing morning sickness even after week 20 of pregnancy. Worse still, a much lesser unfortunate category of women may experience the morning sickness symptoms until a few weeks to birth or until birth itself. This means that if such women started exhibiting these symptoms soon after conception, they experience them for virtually the entire period of pregnancy.

What are the Causes of Morning sickness

There are no clear causes of morning sickness. Although it has been claimed that the physiological reasons resulting from pregnancy cause it, there is no proven evidence for this claim. However, the likely causes of morning sickness include

  • An increase in human chorionic gonadotropin (hCG): During early pregnancy, this hormone increase rapidly. Although it is not known how exactly causes nausea, evidence shows that the occurrence of morning sickness tend to coincide with high levels of hGG.
  • An increase of the hormone estrogen: Estrogen is one of the hormone which also increases rapidly during early pregnancy. It is also a possible cause of the symptoms of morning sickness
  • An enhanced sense of smell: There is a possibility that the sense of smell is enhanced in pregnant women because they are able to affected by smells which would otherwise not affect them if they were not pregnant. Research shows that pregnant women are able to detect smell better than when they are not pregnant.
  • An enhanced sensitivity to odors: Possibly, instead of enhanced sense of smell in pregnant women, it is indeed the sensitivity to orders that that increases. This simply means that a faint smell results in strong effects in the pregnant woman, which may, in turn, trigger nausea and vomiting.
  • A more sensitive stomach: In some women, gastrointestinal tracks become more sensitive during pregnancy. As a result, any small order or certain foods easily trigger nausea and possibly vomiting. However, not all researchers attest to this claim connecting morning sickness with stomach sensitivity
  • Stress: Researchers have suggested that morning sickness symptoms result from to abnormal response to stress by certain women who are psychologically predisposed to nausea and vomiting due to their pregnancy. There is no established evidence for this for this theory.

What Are The Risk Factors for Morning Sickness?

Although morning sickness can affect any pregnant women, it may be more likely to occur the following factors make affect a pregnant woman.

  • Being pregnant with twins or other multiple pregnancies
  • Having a history of morning sickness from previous pregnancies
  • Having experienced nausea or vomiting margarines certain smells and tastes before pregnancy
  • Having experienced nausea and vomiting after using estrogenic substances such as use of birth control pills before pregnancy

What Are the Risk Factors for Hyperemesis Gravidarum

If the following factors affect a pregnant woman, she may be more likely to experience hyperemesis gravidarum, which is a severe form of morning sickness.

  • Belonging to a family with hyperemesis gravidarum history
  • Being pregnant with a baby girl
  • Having experienced hyperemesis gravidarum during your previous pregnancies

When Should You See a Doctor over Morning Sickness

  • You pass very dark urine
  • You fail to pass urine for more than 8 hours
  • You are unable to keep food in your stomach for 24 hour
  • You experience weakness, dizziness or you faint when standing up
  • You have abdominal discomfort of pain
  • You experience fever (high temperature) temperature of 38˚C (100.4F) or above
  • You r vomit is stringed with blood stains

Sources and References

  1. How Soon Will Morning Sickness Start with Twins: https://www.babble.com/pregnancy/morning-sickness-with-twins/


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