Geneticist Marlena Fejzo had a difficult start to her first pregnancy. She suffered from nausea and vomiting, as roughly 70% of pregnant people do, but pushed through until the symptoms lessened with time.
Her second pregnancy, in 1999, was another story. For weeks, all Fejzo could do was lie flat on her back, since even rolling to her side triggered debilitating nausea. Eating or drinking was out of the question, forcing her to get a home IV for nourishment. “Every second,” she says, “was torture.”
Fejzo, who is now 56 and a clinical assistant professor at the University of Southern
