If to you it is not difficult, whether tell or say, please, probably conception at sexual to...

[The anonym]

If to you it is not difficult, whether tell or say, please, probably conception at sexual contact to the girl for its or her 5-th day monthly (last) and use of a method of the interrupted sexual certificate or act. If conception is possible or probable, how it is possible to lower its or his probability? In advance MANY THANKS.

[Oshchepkova S.R.]

Probably. 50 % on 50 %. Use condoms and local chemical agents (panteks-an oval or farmateks) - it is possible simultaneously both of a method.