it persists occasionally until the movements of the child have been
perceived.

Nausea and vomiting are limited, in the vast majority of cases, to
the early morning, but some patients are annoyed only after meals,
and a few at irregular intervals during the day. The fact that the
attacks do not always appear at the same time, and that they differ
in severity, indicates that different causes may be concerned in
their production. And it is true that there are several kinds of
vomiting that occur during pregnancy, although the classification
interests only physicians. The laity, however, should understand that
the treatment of any given case will vary according to the class to
which it belongs, and therefore the occurrence of troublesome
vomiting should be promptly reported to the physician.

Most frequently it will be found that there is nothing serious the
matter. The vomiting ceases or, at least, it becomes less troublesome
as soon as the diet has been more carefully arranged, constipation
has been corrected, or other hygienic details, such as outdoor
recreation and mental diversion, have received the attention
requisite for good health. In a much smaller group of cases the
restoration of the womb to a proper position or the treatment of some
other local condition, which can generally be remedied without
difficulty, is all that is necessary. But finally, in extremely rare
instances, the vomiting of pregnancy is due to a definite disease
whose existence may be recognized by special methods of analyzing the
urine. In any case, if the physician is given an opportunity to make
the necessary observations and thus determine the variety of the
vomiting, no time will be lost in beginning effective treatment. In
an overwhelming majority of the cases, as I have said, nothing