The phenomenon of amenorrhoea can also occur as a result of damage to the endometrium, causing complete adhesion of the uterine cavity. 5. Amenorrhoea can occur after pregnancy. 6. Amenorrhoea can occur during breastfeeding. These are the causes of amenorrhoea due to disease or physiological phenomena. The clinical symptoms will be examined and the cause of amenorrhoea will be understood and dealt with.