regular menstruation without drugs is a very good sign, meaning that the ovaries are functioning. But you must test your chances of pregnancy by the following: 1- Day 2 hormonal profile: FSH, LH, TSH, Prolactin and E2. 2- Anti mullerian hormone measurement at any time. 3- Basal antral follicle count which is measured by a pelvic transvaginal scan day 2-5. 4- Clomiphene citrate challenge test. the above tests give an idea about the function of your ovarian tissue, you may also test your fallopian tubes by a hysterosalpingiography and test your partener by a recent semen analysis if necessary. results of these tests will answer your question. thank you and I wish you the best of luck. Dr. Ahmed Bahaa.