English to Russian Medical Medical: Pharmaceuticals clinical trials

Participants started on Day 1 and were uptitrated from 0.25 mg to 2 mg of BAF312 orally over a period of 6 days. After Day 7, participants continued on the treatment epoch for 3 months. During the Core Part of the study, participants participated in a maximum of 3 epochs. Following the Core Part, eligible patients enter the Extension Part during which all receive open-label BAF312.

Интересно, как принято переводить "epoch".

https://clinicaltrials.gov/ct2/show/NCT01665144