As the loss of proteins from the body progresses, the suffering will gradually become symptomatic. In advanced stages it progresses to dementia and eventually death. Her pregnancy progresses rapidly, severely weakening her. While it is generally considered incurable, CLL progresses slowly in most cases. As dementia progresses, initial symptoms generally worsen. As the disease progresses, complications may develop. Symptoms become more noticeable as the cancer progresses. Maximum paralysis progresses rapidly (two to four days), and usually involves fever and muscle pain. During infancy, myelination progresses rapidly, with increasing numbers of axons acquiring myelin sheaths. Development typically progresses through a number of phases. FIV progresses through similar stages to HIV in humans. In this way, the line of guests progresses steadily without unnecessary delay. SCC often progresses rapidly, and is more common among alloys than pure metals. Multiple myeloma may develop from monoclonal gammopathy of undetermined significance that progresses to smoldering myeloma. As the phase progresses, the tensile strength of the wound increases.