I had hyperemesis with all my girls. Just plain old average m/s with DS.

For me its the sex. With my older girls it kicked it about 5 weeks. With DD3 I thought she must've been a boy coz I had no idea I was pregnant til I was about 7 weeks & ms wasn't too bad. It did get bad though & lasted til 20 - 22 weeks, same as with my other girls, just not half the vomitting.

With DS I rarely got to the point of throwing up. Maybe once every 2 - 3 days (my older girls had been around 20 times a day) & I felt 100% better at 12-13 weeks.