250 mg/week is not an HRT dose, bro. 100mg/week puts 90% of the men out there in the acceptable range for Total Testosterone, Free Testosterone, E2, and DHT. 250mg will put you off the charts, so if you're being tested, be careful.
If you're worried about fertility, get on HCG. It will keep your balls functioning. We had our 2nd kid last year while I was on the "industry standard" of 100mg Test Cyp/week + 500iu/week of HCG.
R1