my sis didnt belief and attnded both black n white events. well. its up to u to believe it or not. she coincidentally had a mc. no one will know the exact cause whether is it her not believing in such superstition or is it cause she aint healthy.
better to check with the bride and groom, if they feel comfortable with it there's no issue. if you still feel concerned then just don't attend lor.
I attend wedding when I was 3 months pregnant . Dun really heard of any elderly saying
attended a wedding in my thirs trimester. was not even aware of such a belief
I attended a wedding in like wk 8. Not sure if theres any eldrly saying thou