Sentence:  But those females who conceive without menstrual <WSD>purgations</WSD>, or who conceive during the time of the menstrual efflux, and not afterwards,...and in the second instance because, after the completion of the menstrual <WSD>purgations</WSD>, the mouth of the womb becomes closed. 
Meaning of the word marked with <WSD> tags:  The process or act of purging, such as by the use of a purgative.