| This regression is due to the suppression of ovarian function which results in anovulation and associated amenorrhea. |
| With ovarian stimulation, ovulation is induced in cases of anovulation or poor ovulation. |
| Another cause of anovulation is polycystic ovarian disease. |
| It is associated with oligomenorrhoea due to chronic anovulation, signs of excessive androgen levels and subfecundity. |
| Weight loss, eating disorders, stress, chronic illness or excessive exercise may all cause hypothalamic anovulation. |
| A general feature of all anovulation syndromes is a lack of pulsatile release of gonadotropinreleasing hormone. |
