I also think a lot of it's hormonal.
When building the placenta, there are different hormones at play. My sickness ended at week 15, and it was like hitting a switch.
One day, violently ill. The next, all better.
I do believe their is some truth to the food aversion/protect baby from poison, and surely I had aversions the whole 9 mos, but the violent illness.. a different thing.
It was miserable. There are so many symptoms to pregnancy I'd never even heard of until i went through it.
