Explain please, that such 1 aja a phase and 2 aja a phase, first half tsi...

[The anonym]

Explain please, what such 1 aja a phase and 2 aja a phase, first half of cycle, and second half of cycle? Thanks.

[Malanova T.B.]

1 phase - the first 14 15 days of a cycle, 2 phase - 16 30 days of a cycle.