Additionally, prolactin delays hair regrowth in mice. In others hair loss and regrowth occurs over years. Efforts may be used to try to speed hair regrowth such as cortisone injections. Research on the regrowth of cochlear cells may lead to medical treatments that restore hearing. This leaf regrowth in grasses evolved in response to damage by grazing herbivores. A 2013 review stated more evidence was needed to determine effectiveness for hair regrowth. She was administered tamoxifen afterward to suppress breast regrowth. Extracellular matrix has been found to cause regrowth and healing of tissue. Neuroregeneration refers to the regrowth or repair of nervous tissues, cells or cell products. Fire was a method of revitalizing pastureland and preventing forest regrowth. Burning also kills tree and grass regrowth. A 2005 study achieved successful regrowth of cochlea cells in guinea pigs. BDOC can contribute to undesirable biological regrowth within water distribution systems. This helps promote regrowth and remapping of damaged neural circuitry. Regrowth of the stylohyoid process and relapse being a common occurrence is debatable.