Placenta placement

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I've been reading tons of studies that show depending on what side your placenta is attached to means if you are having a girl or boy. Apparently if your placenta is attached to the right side you're having a boy and if your placenta is attached to the left side you're having a girl. Do any of you ladies know what side you're placenta was attached to in your recent Pregnancys? Can anybody testify to it?