My Mum never had any morning sickness, and i have not had an unwell day throughout this pg.
She had 2 girls, i have no idea what i am having (most think boy), i would assume that it is something passed on (DH ex had morning sickness with her pg and they had a boy)
Dont know if the sex is relevant, but some say it is...
I have also only got stretch marks in the same places that Mum did