I ask this as this is such a horrid year with the little ones and I don't wish to upset my friends by disrespecting their traditions or beliefs.

I have a vague understanding of Judaism and the "unclean" times for a woman, but wondering how a miscarriage is treated, specially if left naturally to occur.

And in Islam, are there really times after which a name is not spoken?

Are there things that are understood in your religion but which may not be apparent to those outside it? Are there specific mourning times or periods? Are there things that can or can't be said after the death of a loved one?

I don't want to cause pain to friends because I don't understand their core beliefs.

Thankyou in advance.