What is the reason for less menstruation?

If a woman has a history of abortion, it may be related to abortion. In the implementation of abortion, it is necessary to scrape the endometrium through instruments, and then take embryos to achieve the purpose of terminating pregnancy. In this operation process may cause varying degrees of damage to the endometrium, if excessive curettage, there may be damage to the basal layer of the endometrium, so that the endometrium can no longer continue to proliferate, resulting in less menstrual flow, severe cases may also cause amenorrhea. In addition, the presence of endocrine disorders will also affect menstrual flow reduction, such as suffering from polycystic ovary syndrome and other diseases.