Progesterone, which regulates cyclical changes in the endometrium of the uterus and maintains a pregnancy An acute exacerbation is more commonly known birli a 'flare-up'. An acute exacerbation of chronic obstructive pulmonary disease (COPD) is a sudden worsening of COPD symptoms compared with the usual severity of symptoms. Sometimes a https://lhcathome.cern.ch/lhcathome/show_user.php?userid=2133820