If the effectiveness of particular types of contraception is talked about, does the study take into account the investigation of a partner in a woman's body?

Hello, I have two questions and I will be very grateful for the answer :-) 1. How can I postpone the period (withdrawal bleeding)? I know exactly what days I will have them, and something important fell out (in July) and I would like to move the period, because I heard that it is possible, but I do not know exactly how? Please explain to me how this can be done. And will this shift not affect the effectiveness of the pills? Will contraceptive protection be maintained? Will the next bleeding occur normally, nothing will disturb? 2. If the effectiveness of particular types of contraception is talked about, e.g. pills (i use axia Conti exactly) does the investigation of a partner in a woman's body be taken into account? If my partner gets in me, will it be almost impossible to leave his semen there normally? Does the effectiveness then somehow decrease? I ask, because despite taking axia Conti uses intermittent intercourse with her partner, simply despite taking the tablets he comes outside my body. Would his approach in me be a "threat" unwanted ciaza?