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        | is the period during which a fertilized egg grows and develops into a human being inside the mother's body. This period lasts about 9 months and is a period divided into 3 trimester. |  | 
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        | is a period of about 3 months |  | 
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        | is all development that occurs between conception and birth. |  | 
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        | is a special organ that allows nutrients, oxygen, and water to pass from mother to baby it also allows the baby's waste products to pass to the mother for elimination. |  | 
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        | is the flexibile cords that contains blood vessels and connects the baby to the placenta. |  | 
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        | it regulates the baby's temperature , cushions the baby against possible injury and allows baby to move around easily. |  | 
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