Has anyone used the Shettles method when trying to conceive a girl or boy?

I've been hearing about couples using the Shettles method to conceive a girl or boy. I guess the theory is that sperm carrying the X or Y chromosomes move at different speeds, and consequently if you want to conceive a girl you should have intercourse further from ovulation than if you want to conceive a boy. Has anybody ACTUALLY tried this and had it work???

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