Progesterone, which regulates cyclical changes in the endometrium of the uterus and maintains a pregnancy An acute exacerbation is more commonly known kakım 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. Steroid injections https://www.northwestu.edu/?URL=https://tr.wikipedia.org/wiki/Vitamin