What Happens After Fertilisation?

What Happens After Fertilisation?
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What Happens After Fertilisation?

Fertilization Explained

Fertilization is the process of uniting the egg and sperm to form a single cell, called a zygote. This process occurs when the male sperm penetrates the female egg. The sperm provides the nucleus that contains the genetic material and the egg provides the cytoplasm that will nourish the fertilized egg. Once the egg is fertilized, the zygote will begin to divide into two cells, then four, then eight, and so on, until a fully-formed embryo is created.

The Process of Embryonic Development

After fertilisation, the embryo will go through a process of development, which is the process by which a single cell will become a fully formed organism. This process is divided into three distinct stages—the zygote, the blastocyst, and the embryo. During the zygote stage, the fertilized egg will divide into two cells, then four, then eight, then sixteen, and so on. During the blastocyst stage, the embryo will form into a hollow ball of cells. Finally, during the embryo stage, the embryo will begin to develop into a full organism.

The Implantation Process

Once the embryo has developed, it will need to implant itself into the uterus of the mother in order to continue to grow. This process is known as implantation. During implantation, the embryo will attach itself to the uterine wall and begin to draw nutrients from the mother to sustain itself. Implantation typically occurs around six to seven days after fertilisation.

The Formation of the Placenta

After implantation, the embryo will begin to develop its own unique organs and structures. One of the most important of these is the placenta. The placenta is a structure that forms between the embryo and the mother, and it is responsible for providing nutrients and oxygen to the embryo. The placenta also helps to protect the embryo from any toxins or diseases that the mother may come into contact with.


Fertilisation is the first step in the process of creating a new life. After fertilisation, the process of embryonic development will begin, followed by implantation and the formation of the placenta. This process is complex and highly regulated, and is essential for the healthy growth of the embryo.

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