I can't help you with links, but I can offer up this little tidbit:
I am 5'5, weigh 145 and gave birth to a healthy 6lb 14 and 1/2 oz baby boy who RIPPED me apart with NO episiotomy BTW. My good friend who is 5'2 and weighs around 110 or 115, had an ELEVEN lb(yes thats 11lb)3 oz babe vaginally, w/o drugs and had a teeny little 'skid mark'.
She credits perineal massage :smirk.
I am 5'5, weigh 145 and gave birth to a healthy 6lb 14 and 1/2 oz baby boy who RIPPED me apart with NO episiotomy BTW. My good friend who is 5'2 and weighs around 110 or 115, had an ELEVEN lb(yes thats 11lb)3 oz babe vaginally, w/o drugs and had a teeny little 'skid mark'.
She credits perineal massage :smirk.