Tell or Say, please, why to become pregnant in norm or rate about 1 year zhit is necessary...

[Love]

Tell or Say, please, why to become pregnant in norm or rate it is necessary to live about 1 year not being protected why conception does not occur or happen at once even at healthy pair? Thanks.

[Andikjan V.M.]

At any healthy woman within a year 2 3 anovulatory cycles are possible or probable, therefore pregnancy can come or step not in each menstrual cycle