I have done that with bloodwork way before taking any AAS. I took anastrozole and letrozole(separately).
You block the natural conversion of some of your testosterone to estrogen,therefore you have more test.
My estro didn't crash,I took 1 mg adex e3d for example.
My test went from 400 to 750,and estro went down from 40 to 10-15.
I was training vigorously then,and I think it contributed to muscle gain.
No other problems,except that both of them(they are very close chemically),are toxic to my liver. My enzimes rose steadily,so I had to stop. Even after stopping adex,my ALT went to 200 eventually and then returned to normal.