28-day oscillation
Two poles, one cycle
Illustrative curve for testosterone cypionate 400 mg IM every 28 days while ADT continues. Not a patient’s labs.
High pole often 1,000–3,000 ng/dL in the first days. Trough often 100–200 ng/dL by day 28. Next injection restarts the swing. Stop ADT and you no longer have BAT — you have replacement.