A limitation to this study is that there is no known
standard or validated tool for quantifying nausea or
vomiting in the context of pregnancy. We used the
VAS that has been used in the anesthesia and
emergency medicine literature, and we extrapolated
its use to a pregnant population. Another possible
limitation to this study is that it was conducted at
a single center treating primarily military members and
their beneficiaries. Military hospitals offer free care and
medications, which may increase the treatmentseeking. Also, although none of the patients required
hospitalization for nausea during pregnancy during the
trial period, our study was not powered to detect
a difference between the need for hospitalization, time
out of work, or improved mood between groups