With what occurrence slightly krovjanistyh vydeleny in 18 day ts can be connected...

[Small fish]

With what occurrence slightly krovjanistyh vydeleny in 18 day of a cycle can be connected? Pains are not present, a cycle of regular 28 30 days, an ovulation was on 12 13 day of a cycle, basal temperature - 37, 1 37, 2, but thus few times fell up to 36, 7 though usually keeps at a high level. Whether the probability of pregnancy if there was a fertilization is saved?
Before any krovjanistyh vydeleny between monthly was not.

[Oshchepkova S.R.]

The reasons can be two: 1. Hormonal; 2. An inflammation of appendages or uteruses... If there is a fertilization it will be natural pregnancy.