Hi.

I'm just on 6ft tall too.

DS was 10lb 4oz, 55cm long and 38cm head circumference. He wasnt a chubby bub though, was long and lean.

I only had a first degree tear with him though and that happened right at the end, when his shoulders came out.

The amount of weight you put on id really not relevant to how big your baby will be, but given you're not exactly tiny and you DD was a nice weight, I can see why you'd think you'll have a similar sized baby.

The perineal massage your dr suggested is actually supposed to be pretty good i am thinking of trying it this time to see if I can get away with no tearing.

Also the more upright your birthing position the more room you have and more gravity assistance so that can help reduce/avoid tearing as well.

I have heard that tearing is less comon for subsequent births too, so maybe see if you can find some research, but from what I read (I'll try to tack it down as it was good, lots of data) the likliehood of tearing was reduced.