At my girl a divergence in a cycle 0 2 days. How to calculate safe days...

[Sergey]

At my girl a divergence in a cycle 0 2 days. How to calculate safe days when it is possible to not be protected.

[lena]

Here: http: // www. ma-ma. ru/service/calc_ov. html

[Soboleva L.I.]

Dear Sergey! If at the girl the astable cycle, is better to be protected by other methods.