Egg meets sperm (article) | Embryology | Khan Academy - Once the sperm finds the egg
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Egg and sperm travel in opposite directions to meet in (most often) the fallopian tubes. During ovulation, ovaries release an egg into one of the fallopian tubes. When the sperm penetrates the egg, the surface of the egg changes so that no a hormone called human chorionic gonadotropin (hCG) can be found in the.