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Human Chorionic Gonadotropin is a hormone that is crucial during pregnancy. It is produced by the placenta shortly after a fertilized egg attaches to the uterine lining. One of its primary roles is to maintain the corpus luteum, ensuring the production of progesterone which is essential for the sustenance of the early stages of pregnancy.

The presence of HCG is often detected in pregnancy tests, making it a significant indicator for confirming pregnancy. Additionally, HCG is involved in regulating several other functions relating to fetal growth and development.

The other options do not accurately reflect the role or definition associated with HCG. Hormone Concentration Granules, Human Cell Growth, and Hyper Chloric Growth do not correspond to the actual term or its function in biological processes related to human reproduction.

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