Im very petite, small boned and also have a narrow looking pelvis (boyish) and I have had four vaginal births (one back to back which presents a wider diameter of the baby’s head to be delivered)
None of my babies were small, first baby nearly 8lbs with a bigger than average head circumference.
i never have short labours, but all manageable pain wise and with a patient midwife who feels confident to allow descent and time for pushing I’ve been fine and all my babies were born totally fine, no fetal heart rate issues, no meconium, no long term issues from having to navigate my pelvis, no significant pelvic or perineal injury no use of ventouse or forceps.
I was lucky I had patient and confident midwives who let me eat, drink, move around father than wallop me on my back, starve me ‘just in case’ and they kept doctors itchy fingers away from me 😂
I expect I’d have ended up with a CS at least two of my labours had that not been the case because I don’t follow the expected ‘rate of dilation’ of the chart they use, but I did progress constantly, just slowly and as I say babies were always fine during labour, no concerns so no justification for interventions apart from Drs not liking it taking a bit longer than they’d like and I’m glad my midwife advocated watch and see because me and baby were doing fine.