Geneticist Marlena Fezjo says she had bad morning sickness during her first pregnancy, but the symptoms she experienced during her second pregnancy in 1999 were much worse. The only time Fezjo wasn't nauseous, she says, is when she laid "completely still and flat," and she wasn't able to hold down food or drinks. Fezjo was eventually diagnosed with hyperemesis gravidarum (HG), but when she talked about her symptoms with her doctor, they didn't believe they were as bad as she described. Fezjo wasn't exaggerating in the slightest: "It was so bad that I could not eat or move without vomiting." She went on to discover the gene that caused her severe morning sickness symptoms.

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Persons: Marlena Fezjo, Fezjo, hyperemesis gravidarum, Wales, Kate Middleton, haven't Organizations: CNBC, National Health Service, Harmonia Healthcare