When you undergo Chemotherapy, you are induced into a clinical menopause if you are over a certain age. If you are young, then this can be reversed naturally.
However, if you have menopause, then you must have a mammography every 2 years which will screen for breast cancer.
Being menopausal means that you are lacking hormones especially is it's before your time, so your doctor might prescribe HRT which could also be cancerous.
A mammography will usually be done in 2 steps:
1. A technician will summit your breasts to 4 screening x-rays consisting of putting your breasts into a machine which presses down on your breasts to get the best x-ray possible.
2. The Doctor will see you and give you the results, after which he will examine your breasts by conducting an echography and even breast palpating if necessary
English 
French