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Eggs are fertilized at conception, before the egg is laid, if we are talking about a bird. Birds conceive like people do, through sexual intercourse.You can find more information
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When an egg is first fertilized it is called a zygote. The fertilized zygote then travels down the fallopian tube, while dividing and growing, after about four days it becomes a blastocyst
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Chicken eggs are fertilized inside the hen. The ovary of a hen releases a yolk that is then fertilized by a sperm inside the hen. It takes 21 days for an egg to hatch. You can find
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Bird eggs are fertilized by sperm. The male bird mounts the female and releases his sperm into her opening. It turns out that male brids do not have outward sex organs and that they
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