Nausea and Vomiting in Pregnancy (Morning Sickness)
Published: 09 November 2022
Published: 09 November 2022
Between half and two-thirds of people experience feelings of malaise - specifically nausea and vomiting - during pregnancy (Better Health Channel 2022).
The colloquial term ‘morning sickness’ is considered to be an inaccurate name for these symptoms, as a person may feel ill at any point during the day (or night) and symptoms are not exclusive to the hours of the morning. Therefore, the preferred term is nausea and vomiting in pregnancy (NVP) (Tan et al. 2016).
NVP typically affects birthing parents during the first trimester. However, some people will experience these symptoms all the way up until delivery (Smith et al. 2021; Healthdirect 2020).
Across healthcare, NVP is still not well understood in terms of why it occurs and how it manifests (Taylor 2019).
There are many reported cases of doctors, midwives, pharmacists and other health professionals dismissing claims of severe morning sickness, contributing to the stigmatisation of NVP as something that those who are pregnant exaggerate or make up (Taylor 2019).
This contradicts research into the prevalence of NVP, which is estimated to affect up to 80% of people during pregnancy. NVP ranges from mild nausea and vomiting to pathologic hyperemesis gravidarum (Healthdirect 2020).
Severe NVP, known as hyperemesis gravidarum (HG), affects one in 1,000 people during pregnancy.
HG is defined as nausea and vomiting so intense that it results in electrolyte abnormalities, dehydration, and weight loss of around 5% of (pre-pregnancy) weight (NORD 2020).
Treatment for HG usually requires admission to hospital (Better Health Channel 2022).
While the exact causes of NVP and HG occur are unknown, nausea and vomiting during pregnancy are commonly accepted to be associated with pregnancy-related hormonal changes (Pregnancy, Birth & Baby 2021).
(Smith et al. 2021; NHS 2021)
It’s common for symptoms of NVP to appear in the first four to nine weeks of pregnancy (DoHAC 2019).
Primary symptoms of NVP include:
(Better Health Channel 2022)
A person who is pregnant may be concerned that frequent vomiting could pose a health risk to their baby - this is an unfounded fear. In fact, the opposite appears to be true: studies suggest that mild to moderate morning sickness is linked to a reduced risk of miscarriage (Better Health Channel 2022).
This aside, prolonged periods of vomiting that cause dehydration and weight loss could deprive the baby of adequate nutrition, increasing the risk of the baby being born underweight (Better Health Channel 2022).
HG should be treated without delay to avoid serious health complications for both the birthing parent and the child (Better Health Channel 2022).
(Pregnancy, Birth & Baby 2021; Tan et al. 2016)
Emotional support offered by a medical professional is advisable in the case of severe NVP or HG. This is particularly relevant for people who are experiencing severe symptoms as well as additional sources of stress such as marital or family conflict. Therapy may include supportive psychotherapy, behavioural therapy or hypnotherapy (Lee & Saha 2011).
The main goal of this therapy is not to treat NVP symptoms, but to encourage the patient to express stress and emotions and improve their quality of life (Lee & Saha 2011).
There is inconclusive evidence regarding the success of treating severe NVP and HG using acupressure and/or acupuncture, but research has shown that some people find it useful for managing nausea and vomiting. Despite insufficient research, many experts see it as a valid intervention given its reported success in certain trials and the fact that no adverse side effects are known (Lee & Saha 201; BBC News 2016).
Nausea and vomiting in pregnancy is a common condition and may even be an indicator of a healthy pregnancy. It is, however, debilitating for some people and should not be underestimated in its severity.
For some, NVP causes a significant reduction in quality of life. While it can often be managed through diet and lifestyle changes, further intervention may be necessary in severe cases. Hyperemesis gravidarum should be treated vigorously to prevent birthing parent and fetal mortality.
Question 1 of 3
True or false: NVP typically only occurs in the morning.