Complex sentence: Women are able to experience multiple orgasms which can be serial multiple meaning they are experiencing several orgasms immediately one after another or sequential multiple orgasms, which are the orgasms that occur one after another but separated by few minutes.
Split into simpler sentences: Women are able to experience multiple orgasms which can be serial. Multiple meaning they are experiencing several orgasms immediately one after another or sequential multiple orgasms, which are the orgasms that occur one after another but separated by few minutes.