Franbern
Sounds to me as if the origions of Candlemas is to do with the Jewish tradition of Mikvah - ritual baths. These are gone to by the very strict jewish women following their monthly periods, and again, when bleeding stops after birth,. Often up to 40 days.
Religious practice is so much inter-twined with each other and with Paganism. Holly and Ivy (Pagan) at Christmas -which is based on Saturnalia. etc. etc.
Candlemas - "Feast of the Presentation of Jesus Christ, Feast of the Purification of the Blessed Virgin Mary"
And, of course, Mary was Jewish.
Women were not supposed to go out and mix with others after childbirth until they had been Churched.
I remember visiting an aunt with our new baby and she asked me if I'd been churched yet.