zdrastvujte. Prompt please, I have read through, that disturbance of a menses...

[Maria]

zdrastvujte. Prompt please, I have read through, what disturbance of a menses when monthly zaderzhiv-sja more than for 35 days and earlier than 21 day and if at me the cycle varies from 24 days up to 28 this disturbance?

[Malanova T.B.]

It is a variant of norm or rate.