So the link to the article has been removed by the powers-that-be! I suggested that since this is a DEBATE forum, that posting links to things worthy of debate might be appropriate. If you want to read the article, go the the guardian website, guardian.co.uk, and search for morning sickness.
Here are a few more of the relevant paragraphs -- I don't want to infringe copyright!:
"Harrison said the abortion was "the most horrendous decision I have ever made". But she simply couldn't cope, she told a newspaper last week. "I was vomiting morning, noon and night . . . I had one day where I could not move from the bathroom. I couldn't get Scarlett [her toddler] anything to eat even though she was starving. I dragged myself across the floor, managed to get her some chocolate from the fridge and thought, 'I can't do this again.' "
"Around seven in 10 pregnant women have episodes of nausea during pregnancy; but a smaller number, around one in 50, suffers the kind of extreme sickness, or "hyperemesis gravidarum", experienced by Harrison. And for one in 100, the symptoms are bad enough to require hospital treatment, usually because they've become so dehydrated that they need intravenous fluids."