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Recurrence risk in hyperemesis gravidarum.
Lill I S Trogstad1, Camilla Stoltenberg, Per Magnus
1Department of Obstetrics and Gynecology, Ullevål University Hospital, Oslo, Norway.
BJOG : an International Journal of Obstetrics and Gynaecology
|November 25, 2005
Summary
Women with hyperemesis gravidarum in a first pregnancy have a significantly higher risk of recurrence in subsequent pregnancies. A change in paternity reduced this risk, while a longer interval between births increased risk only in women without prior hyperemesis.
Area of Science:
- Reproductive Medicine
- Obstetrics
- Perinatal Epidemiology
Background:
- Hyperemesis gravidarum (HG) is a severe form of nausea and vomiting during pregnancy.
- Understanding recurrence risk and influencing factors is crucial for clinical management.
Purpose of the Study:
- To compare HG risk in second pregnancies based on HG history in the first pregnancy.
- To investigate the impact of paternity changes and inter-delivery intervals on HG recurrence.
Main Methods:
- Population-based cohort study using the Medical Birth Registry of Norway (1967-1998).
- Included 547,238 women with records of first and second singleton deliveries.
- Logistic regression models estimated odds ratios (ORs) for HG recurrence, controlling for confounders.
Main Results:
- Women with prior HG had a 26.4-fold increased risk of HG in their second pregnancy (15.2% vs. 0.7%).
- A change in paternity was associated with a reduced risk of recurrent HG (adjusted OR=0.60).
- Longer intervals between deliveries increased HG risk only in women without a history of HG.
Conclusions:
- HG recurrence is highly probable in women with a history of the condition.
- Changing paternity appears to mitigate the risk of HG recurrence.
- Further research is needed on genetic and environmental factors in HG.