Some women do complain that their period become irregular as soon as they place them on fertility treatment. It is possible that you may be menstruating regularly and your body may be good yet not get pregnant. two things are likely to be the problem that makes your period to stop or scanty, it may be due to low quality of egg which means you have PCOS. It is because your body sensed the change in your body due to the treatment and was fighting it due to your age. The Second, is that if you have PCOS and you take any treatment that will make you to ovulate, the egg might be seen at the mid-cycle but stopped your period at the end of the cycle because your body failed to respond positively to the treatment being given to you. My advice is to visit a fertility clinic for evaluation an to know what to do.
Fertility
The Emotional Journey of Infertility
Infertility can be a difficult and emotional journey for many couples, affecting not only their physical health but also their
