Hello, the doctor. At me a problem. I know, that when begin monthly...

[The anonym]

Hello, the doctor. At me a problem. I know, that when begin monthly, the basal temperature should lower or omit below 37 degrees. Monthly there is day, but has already gone or sends already on a loss. Though usually go 4 - 5 days. Basal temperature stably 37. Why so?

[Malanova T.B.]

And can it is necessary change a thermometer? If with a thermometer of problems is not present, it can be display of some gynecologic diseases.