Hyperemesis gravidarum, the reason newly pregnant Kate Middleton is in the hospital, is a rare but acute morning sickness that results in weight loss and accounts for about 2 percent of all morning sickness, doctors say.
Tthere is also speculation that the Duchess could be expecting twins after she was hospitalised with a condition that is often associated with multiple births.
Women diagnosed with hyperemesis gravidarum have lost 5 percent of their pre-pregnancy weight, or 10 pounds, said Dr. Ashley Roman, a professor and OB/GYN at New York University Langone Medical Center.
It poses little danger to the tiny heir, doctors said……..read more HERE