Describe the hormonal control of a pregnancy in a human female.

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Sometimes during a woman's pregnancy the body does not produce enough of the right kinds of hormones. One of these hormones is progesterone. Progesterone is responsible for preparing and thickening the uterus for the implantation of the embryo. Progesterone is produced by the corpus luteum. At the very beginning of pregnancy it is very normal for a doctor to check progesterone levels via a blood test. If these levels are too low then the woman may be given progesterone (pill) to help sustain the pregnancy. If levels remain low then the pregnancy cannot continue and the woman will have a miscarriage.

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