What is a fertilized egg known as?

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Control of a woman's fertility has been a significant factor in the improvement of millions of people's quality of life worldwide. The pill is the most popular method of birth control. Women who are not having sex also use it, as it can help to make periods less painful, lighter and more regular. The hormones used are estrogen and progesterone which suppress the production of FSH in the ovaries. It is FSH that prepares an egg cell for fertilization each month. Early forms of 'The Pill' contained higher levels of estrogen than they do nowadays. This caused many side effects including weight... Show more

What is a fertilized egg known as?