"Some women, when pregnant, must refrain from time on the water due to
severe bouts of naseau. Not only is this recommended for the comfort of the
lady, it is imperative for the safety of the fetus. It has been found that
the fetus can suffer from motion sickness also. This puts baby at greater
risk."

Handbook of Maritime Medicine, 1988, p 421, Selchow and Righter Publishers

Van