My parents were fairly prude (I was handed a booklet and told to read it when aged 10) and my mother managed bravely when a French exchange girl was staying with us and had a period, but wasn't prepared for it. So Mum was coping with the language problem as well. Perhaps it was easier like that. She made up sanitary towels using muslin and cotton wool until she could buy some for our guest.
I only really half understood what was going on as I hadn't started my periods then, and, in fact, was very much the type who didn't really take any interest until it affected me personally. I had read the booklet she had given me but didn't think it had anything to do with me either!
However, when my periods did start, I was unfazed and saw the whole process from a scientific point of view. My 3 DS have always had that attitude, too. We watch fascinated when having blood samples taken or when having injections.
So nothing really embarrassed me as a child. Although I did cringe at anything that drew attention to me such as "Haven't you grown?"