Explain the major developmental milestones that take place during pre-natal development

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Expert Solution

The Pre-Natal development can be divided into three stages which are described chronologically as follows:-

Stage 1 : The Geminal Stage
This stage usually lasts for two weeks after conception. After the formation of the zygote, the cell division and development happens at an exponential rate and the resulting ball moves along the fallopian tube. Within 7 days of conception, the ball gets attached to the uterus and this process is known as implantation.
Stage 2 : The Embryonic Stage
This stage begins at the end of the Geminal stage and lasts for about 2 months. It is during this stage that the ball of cells develops into an Embryo. It is in this Embryonic stage that the development of all the important organs and life-supporting systems take place.
Stage 3 : The Fetal Stage
This stage begins at the end of the Embryonic stage and lasts till the birth of the child. The development of sex organs take place in the fetal stage. Also the development happens very quickly as the formation and development of bones and muscles takes place. Also the brain increases rapidly in the size during this stage.

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