Original sentence: Rectal prolapse is often associated with the following conditions: advanced age, long term constipation, long term diarrhoea, long term straining during defecation,anal sex,  pregnancy and stresses of childbirth, previous surgery, cystic fibrosis, COPD, and sphincter paralysis
Edited sentence: Rectal prolapse is often associated with the following conditions: advanced age, long term constipation, long term diarrhoea, long term straining during defecation, pregnancy and stresses of childbirth, previous surgery, cystic fibrosis, COPD, and sphincter paralysis