Q:

What is a fertilized egg called?

A:

Quick Answer

A fertilized egg goes through several stages of development but initially is called a zygote. The next stages of development are blastocyst, embryo and fetus.

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Full Answer

It takes between three and five days for the zygote to traverse the fallopian tubes into the uterus, where it develops into a blastocyst. The blastocyst, little more than a congregation of cells, implants in the uterine wall, where the amniotic sac grows. The embryo stage follows where the body takes form and internal organs begin to develop. Eight weeks after fertilization, the embryo is developed enough to be considered a fetus. During this final stage, the bodily components that formed as an embryo continue to mature until delivery.

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Related Questions

  • Q:

    What are diploid numbers and haploid numbers?

    A:

    Haploid numbers refer to the number of chromosomes in an egg or sperm cell, and it has the abbreviation "n." Diploid numbers refer to the number of chromosomes in other types of cells, such as the zygote that appears when the sperm cell fertilizes an egg, abbreviated "2n."

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  • Q:

    Can two sperm fertilize one egg?

    A:

    Fertilization of one egg by two sperm is possible, but the resulting zygote is almost never viable because such a zygote would have three sets of chromosomes instead of the normal two. This condition, called triploidy, is usually incompatible with life. Those rare triploid infants that do survive to term have severe and multiple birth defects and rarely live more than a few days.

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  • Q:

    How long does it take a fertilized egg to implant?

    A:

    It takes 6 to 10 days for implantation to occur after fertilization of the egg, as stated by BabyCorner. Implantation occurs after the embryo becomes a blastocyst, a cluster of multiplying cells.

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  • Q:

    When is a woman most likely to get pregnant?

    A:

    According to the American Pregnancy Association, a woman is most likely to get pregnant during ovulation, which occurs when a woman's ovary releases a mature egg that can be fertilized by sperm. After leaving the ovary, an egg can only survive for up to a day. Ovulation occurs between the 11th and 21st day of a woman's menstrual cycle. A woman's menstrual cycle is lasts approximately 28 to 32 days.

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