Mucous, Menstruation M Having Transperrant Mucous Instead Of Bleeding During Menstruation. Why So?

M having transperrant mucous instead of bleeding during menstruation. why so? - mucous, menstruation

My age is 30 Young, my mother had one years old. was a normal birth. The last two times, during menstruation, transperrant with m instead of mucosal bleeding. I had a history of endiometrosis. and hyperthyroidism. But after the baby concieving my thyroid function is normal. My ultrasound report says that the endometrium of the ovary, only 3.4 mm. Whatever the reason, the mucous membrane, for example?