True or false: girl sperm live longer, and boy sperm are faster?

I’ve heard that if you have sex earlier in your fertile days then you’re more likely to have a girl (because the female sperm live longer and will make it until ovulation) and that the closer to ovulation you have sex the more likely you are to have a boy (because male sperm are faster and will reach the egg quicker if you’re already ovulating). I am wondering how true it’s been for all of you.

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