Girls produce more hCG than boys do. So it's possible BUT I know people that have had a girl with little to no m/s.. so IDK! Each pregnancy is different and even though m/s is worse this time than with DS I am not going to make any assumptions! But I've read a few studies about it and I do think it makes sense. That said, my aunt had a girl first time and she had some m/s with her in the first trimester and then she had a boy and had horrible m/s with him throughout her pregnancy!