Will I get my regular periods back after treatment with Estrof?

Hello, the gynaecologist prescribed me to use estrophem for 2 months – I have a secondary loss of menstruation (the interval between the last period is 1.5 years) and a negligible level of estradiol (its level is only 2mg, even though I am a young woman). Will the natural menstrual period immediately return after the prescribed use of the drug and will it occur regularly? Will I have to continue to supply synthetic estrogen for it to occur?