Steroid levels are controlled through feedback regulation. “In mammals, steroid growth hormones released from the pituitary can exert a short-loop feedback on its own synthesis” (Anderson et al.). The released steroid growth hormone acts as a feedback signal to the hypothalamus and pituitary letting the body know when there is enough hormone present to stop synthesis and/or mobilization of more. This mechanism is very precise as the release of miniscule amounts of steroid hormone is amplified and noted by receptors in the body. In this way, small changes in the steroid hormone concentration can be detected by the body allowing for extremely precise regulation.