It is possible that owing to your age your hormone levels have decreased naturally as well as your ovarian response. Therefore, the normal triggering dose of Menogon may not have been sufficient. Estrogen
is given for improving the endometrium prior to IVF. As age goes by, the number of follicles in the ovaries decrease and so ovarian stimulation
results in little or sometimes no response-this is sometimes called oopause. FSH levels may be high due to this and you will need more medication for ovarian stimulation. Please consult your doctor for further opinion. Take care.