Zdravstuvjte! I had a stable cycle - 28 days. One month ago a cycle poluch...

[Marina]

Zdravstuvjte!
I had a stable cycle - 28 days. One month ago the cycle has turned out 30 days, and this month - 26.
Whether es a problem? The doctor does not see any reasons for trouble.
Thanks.

[Kamenetskij B.A.]

And it is valid so.