The term “vacation” generally stands for menstruation. The absence of menstruation after 3 years of painless abortion may be caused by mental trauma, incomplete abortion, serious damage to the uterine lining, polycystic ovary syndrome and other reasons. 1. Mental trauma: excessive mental tension, anxiety, fear, fear of abortion or thought burden due to the inability to conceive and give birth, and failure to change such emotions after the operation may lead to painless abortion for 3 years without menstruation. 2. Incomplete abortion: if there is residual tissue in the uterine cavity, the residual embryonic tissue will lead to human chorionic gonadotropin not being able to fall to the normal level for a long time, and the ovaries will not be able to return to normal, which will lead to no menstruation after 3 years of painless abortion. 3. Serious damage to the uterine lining: after painless abortion, if the uterine lining is damaged or thinned, it is easy to cause painless abortion not to have menstruation for 3 years. 4. polycystic ovary syndrome: patients with polycystic ovary syndrome, the main manifestation is menstrual scanty or long time amenorrhea. So the situation of painless abortion for 3 years without menstruation has appeared. It is recommended that painless abortion patients who do not have menstrual periods for three years should go to a regular hospital in time to find out the reasons, and take targeted treatment under the guidance of a professional doctor.