Progesterone, which regulates cyclical changes in the endometrium of the uterus and maintains a pregnancy Steroids dirilik be classified based on their chemical composition.[52] One example of how MeSH performs this classification is available at the Wikipedia MeSH catalog. Examples of this classification include: In more complicated situations they may https://www.metooo.co.uk/u/672d203eda295e118f50319e