Nope, completely wrong for me.

MIL had bad morning sickness with DH (only child). Ive had none with all 3 pregnancies.

Mum had short labours.. only an hour or 2. My first was 11 hours, second was 16.5 hours. Mum's labours got shorter each child (3) mine.. so far.. have been longer. Mum went into labour before her due date with all 3.. ive always been over.