by hvered » 9:27 am
Seems unlikely, unless by sacred you mean secret. Most women prefer to give birth in safety, childbirth being a risky business. However one can imagine women whose waters broke while working might prefer a cave to giving birth in the open. Most underground caves, particularly in Britain, appear to be cold and damp, not at all suitable for the job,
It was common practice of course to bury money, valuables, food (Pepys' cheese is well known, but only because he wrote about it) for secrecy/safety.