<unk>  acts as an endocrine, autocrine, paracrine, and intracrine hormone. It regulates endochondral bone development by maintaining the endochondral growth plate at a constant width. It also regulates epithelial–mesenchymal interactions during the formation of the mammary glands. Tooth eruption<unk>  is critical in intraosseous phase of tooth eruption where it acts as a signalling molecule to stimulate local bone resorption. Without<unk> , the bony crypt surrounding the tooth follicle will not resorb, and therefore the tooth will not erupt. In the context of tooth eruption,<unk>  is secreted by the cells of the reduced enamel epithelium. Mammary glands It aids in normal mammary gland development. It is necessary for maintenance of the mammary bud. Loss of<unk>  or its receptor causes the mammary bud cell fate to change back into epidermis. In lactation, it may regulate in conjunction with the calcium sensing receptor the mobilization and transfer of calcium to the milk, as well as placental transfer of calcium. Humoral hypercalcemia of malignancy<unk>  is<unk>  in function to the "normal"<unk>  hormone. When a tumor secretes<unk> , this can lead to hypercalcemia. As this is sometimes the first sign of the malignancy, hypercalcemia caused by<unk>  is considered a paraneoplastic phenomenon.<unk>  is responsible for most cases of humoral hypercalcemia of malignancy.<unk>  shares the same N-terminal end as<unk>  hormone and therefore it can bind to the same receptor, the Type I PTH receptor <unk> .<unk>  can simulate most of the actions of PTH including increases in bone resorption and distal tubular calcium reabsorption, and inhibition of proximal tubular phosphate transport.<unk>  lacks the normal feedback inhibition as PTH. However,<unk>  is less likely than PTH to stimulate 1,25-dihydroxyvitamin D production. Therefore,<unk>  does not increase intestinal calcium absorption.
Parathyroid hormone-related protein
Calcitonin gene-related peptide
Calcitonin
Calcitriol
Thyroid peroxidase
Thyroglobulin
Androgen prohormone
Thyroid-stimulating hormone