Subjects of the age of 19-35 years, weighing within
20% of normal weight at the beginning of pregnancy
and being in 7 and 17 weeks of gestation were included.
The exclusion criteria were: coexistence of other disease
that cause vomiting such as thyroid disease, history of
gastroenteritis, or gastrointestinal disease, infections,
multiple pregnancy, hyperemesis gravidarum, trophoblastic disease and psychological disorders.12 This
also applied to women who received antiemetic agents
such as vitamin B6, metoclopromide or drugs enhancing
the condition such as iron tablets during last week.