I also had a fast labour and delivery Waking up at 1:30 am with contractions 5 minutes apart and had my baby girl in my arms at 4:40 am. This was much faster than I was expecting - my first birth was 10 hours. It was also way more intense!!! And I did not believe I was about to give birth until I felt her head crowning.
I was 41 +1 and very ready to give birth already. I did not have any internal examination prior to or during the labour - so I just don't know how 'ready' I was when the contractions started. My uterus was very responsive the day before, with contractions being triggered just by touching my belly.
I drank RRL on and off through my pregnancy and was taking lots of DHA and EPA, as well as calcium, magnesium, zinc and lots of greens, good fats and protein... I think it was more that I made peace with my father the evening before I went into labour. We had not spoken in quite some time and have had a very bitter relationship since my mother passed - and we were able to make peace, and lay the foundations for repairing our relationship. Anyway, I attribute this to triggering my labour - even if it did not influence how quickly it all happened. I was finally ready to receive our little girl into our family.