The union of sperm and egg is called fertilization. The spermatozoa break through the nipple of the spermatic cord and come out and swim in the water in swarms. Within 24-48 hours, the sperm unites with the egg to form a zygote.
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The union of sperm and egg is called fertilization. The spermatozoa break through the nipple of the spermatic cord and come out and swim in the water in swarms. Within 24-48 hours, the sperm unites with the egg to form a zygote.