Cycle syncing and strength training
Cycle syncing means changing the type or intensity of exercise to match the phase of your menstrual cycle. The NHS gives no guidance on programming training by cycle phase, so a strict phase-by-phase plan is not something a trainer can offer as fact. What a trainer can do is simpler and more useful: keep the same programme all month and adjust each session to how you feel on the day.
Adjusting a session to how you feel
Strength programmes already have a tool for this. Rating each set by how many more repetitions you could have done lets the load come down on a heavy, tired or crampy day and go up on a good one, without abandoning the plan. Keeping a note of your cycle alongside the training log shows whether the harder weeks follow a pattern for you, which is more reliable than a general rule.