The chorion of the zygote begins to produce human chorionic gonadotropin (HCG)in the earliest stages of pregnancy.

Name: The chorion of the zygote begins to produce human chorionic gonadotropin (HCG)in the earliest stages of pregnancy.
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This is true. The chorion, which later becomes the placenta, begins to produce HCG after implantation in the uterus. HCG is the hormone detected by pregnancy tests and helps to support the developing embryo.

The Chorion of the Zygote Begins to Produce Human Chorionic