I had a vaginal birth with DD, but it became very long due to (I believe) my heavy epidural and this also contributed to a vacuum delivery and general feelings of disconnection from the birthing process. I've found it very hard to find research linking epidurals to longer births and / or PND though my gut tells me there is a real link. Anyway long story short, while my medical interventions were comparatively minimal and it was a spontaneous labour, DD and I had great trouble with breastfeeding for the first few weeks. I think we were both exhausted, dazed and confused from a long birth, DD especially so from vacuum. I felt disconnected and anxious etc.