Affects approximately 75% of pregnant women.
Typically begins between the fourth and seventh week after the last menstrual period and resolves in the second trimester.
Aetiology remains unclear. There is some evidence that it is related to hormone levels of human chorionic gonadotrophin and oestrogen.
Hyperemesis gravidarum represents the most severe form of nausea and vomiting of pregnancy. While there is lack of consensus of definition, most agree that clinical features include persistent vomiting, volume depletion, ketosis, electrolyte disturbances, and weight loss.
Initial therapy should be conservative. This may include non-pharmacological treatments such as diet modification, emotional support, ginger, and acupressure.
Severe cases may require hospitalisation, intravenous fluids, anti-emetics, corticosteroids, and total parenteral nutrition.
Nausea and vomiting in pregnancy (NVP), commonly referred to as morning sickness, typically begins between the fourth and seventh week after the last menstrual period. It is characterised by nausea and vomiting that occur more frequently during the morning hours, and typically resolves in the second trimester. Hyperemesis gravidarum is the most severe form of NVP and is characterised by persistent vomiting, volume depletion, ketosis, electrolyte disturbances, and weight loss.
History and exam
- full blood count
- basic metabolic panel
- serum liver function tests
- serum urea and creatinine
- serum thyroid-stimulating hormone (TSH) and free thyroxine (T4)
- urine or serum ketones
- fetal ultrasound with nuchal translucency
- serum analytes
- Helicobacter pylori breath test
Jeffrey D. Quinlan, MD
Uniformed Services University of Health Sciences
JDQ declares that he has no competing interests.
Sarah Jorgensen, DO
Family Medicine Residency
Naval Hospital Jacksonville
SJ declares that she has no competing interests.
Yosra Tahir Jarjees, MD
Head of Department of Obstetrics and Gynecology
Mosul College of Medicine
YTJ declares that he has no competing interests.
D. Ashley Hill, MD
Department of Obstetrics and Gynecology
DAH declares that he has no competing interests.
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