From implantation through the 8th week, the major body organs and systems develop. This period of pregnancy is called:

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This period of pregnancy, from implantation through the 8th week, is known as the embryonic period. During this time, the major body organs and systems are formed. The zygotic period refers to the first 2 weeks after conception, while the germinal period refers to the first week after conception. The fetal period begins after the end of the embryonic period, around the 9th week of pregnancy.

From Implantation Through the 8th Week, the Major Body Organs