I have occasionally wondered what real research has gone/is going into hyperemesis/morning sickness. I certainly don't want to ask in the Pregnancy area because that would be very insensitive.
I have read that it's an evolutionary thing, so that pregnant women don't eat something that's possibly injurious to the baby. But I've also read that it's something to do with one of the pregnancy hormones affecting the smell receptors in the nose which then affects the sense of taste.
"Ordinary" morning sickness is sometimes a bit of a joke to someone who's never experienced it; and very few people realise that it can be bad enough to require hospitalisation.
As others have mentioned, the medical professional referred to in the CBS article is a psychologist, not an obstetrician, and the 2000 abstract is about pre-eclampsia. Which is another pregnancy-related condition that needs more research.
And if both those conditions are related to the presence of foreign matter (i.e. paternal DNA) then there needs to also be a scientific explanation as to how humankind has managed to survive so long, and why other primates don't seem to have the same problems (from what I gather from captive breeding programmes for endangered species).
The hypothesis that some of our pregnancy hazards could be prevented just by swallowing sperm is repugnant as well as being scientifically simplistic.