Boys result from XY chromosomes (girls from XX). Y-sperm are the fastest but most fragile. For best odds, have sex on ovulation day or within hours around it. This lets speedy Y-sperm reach the egg first, beating slower, hardier X-sperm. Track ovulation precisely—easy with regular cycles, harder if they vary.
In the late 1970s, French gynecologist Dr. Papa showed a mother's diet influences baby sex. For a boy, emphasize sodium and potassium: savory dishes, sodium-rich sparkling waters, meat, fish, charcuterie, dried fruits (figs, apricots, prunes), potatoes, mushrooms, legumes, sweets, cakes. Skip dairy (yogurts, cheeses), seafood, eggs, nuts (hazelnuts, almonds, walnuts, peanuts).
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Y-sperm's speed thrives with deep penetration, placing them nearer the egg. Female orgasm helps too—vaginal contractions speed sperm ascent.
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