Drag the labels to complete each sentence. human chorionic gonadotropin placenta estrogen and progesterone chorion corpus luteum ovary The secretes which 1 is the hormone most pregnancy tests are designed to detect. This hormone travels in the blood to the maternal and causes the corpus luteum to remain functional. The secreted by the corpus luteum are essential for maintaining the endometrium for the first 3 months of pregnancy. By the third month of pregnancy the is a fully formed endocrine gland that secretes sufficient amounts of these hormones and the is no longer needed.

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