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Overview :
Louik et al identified risk factors for nausea with or
without vomiting in a pregnant woman. The authors are from Boston University.
Nausea during pregnancy:
(1) is common (affecting 50-80% of pregnancies; 67% in
current study)
(2) usually starts during the first trimester (early onset)
(3) prevalence peaks between months 2 and 5 of the pregnancy
Risk factors for nausea during pregnancy:
(1) younger age
(risk decreases with increasing age; adjusted odds ratio highest when <= 25
years of age, lowest when > 40)
(2) increased
gravidity (including miscarriages and abortions)
(3) multiple
gestation (twins, triplets, etc.)
Risk factors for onset of nausea after the first trimester
(late onset):
(1) Black race
(2) lower level of education
(3) lower income level
Other factors associated with slightly increased risk
(Tables 1 and 2)
(1) stopping
smoking
(2) presence of
a urinary tract infection
(3) presence of
pre-eclampsia
(4) presence of
oral or genital herpes
(5) presence of
vaginal bleeding
(6) presence of
obesity
Other factors associated with slightly decreased risk
(Tables 1 and 2)
(1) continued
smoking during pregnancy
(2) Blacks and
Native Americans had lower risk than other racial groups
(3) presence of
diabetes
(4) presence of
seizures
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