Progesterone, which regulates cyclical changes in the endometrium of the uterus and maintains a pregnancy An acute exacerbation is more commonly known as 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. A short https://gaiaathome.eu/gaiaathome/show_user.php?userid=138435