Dydrogesterone in the Treatment of Endometrial Polyps

Inclusion Criteria:

1. women of childbearing age from 20 to 50 years old

2. with or without menstrual changes:

3. menostaxis (longer than 7 days)

4. shortened menstrual cycles(less than 23 days)

5. menorrhagia(more than twice as much as usual)

6. abnormal vaginal bleeding(non-menstrual vaginal bleeding)

7. with following signs of vaginal ultrasound in the follicular phase (day 1 to day 10 ofa menstrual cycle):

8. typical signs with a suspect of EP: (median/high) echo with a regular contourwithin the uterine lumen;

9. atypical signs with a suspect of EP: punctate cystic areas within the endometriumand the endometrial thickness >1cm;

Exclusion Criteria:

1. no menses within half a year;

2. surgery or drug treatment of endometrial lesions in the past half year;

3. with current intrauterine device;

4. combined with other acute gynecological inflammation;

5. with clinically suspected malignant tumors;

6. long-term use of oral contraceptives;

7. with abnormal liver and kidney function;

8. with benign or malignant breast tumors;

9. with any systemic malignant tumor or a history of tumors;

10. participants who are pregnant.