Regularly eat short-acting oral contraceptives, has established a good cycle after intercourse, you can ejaculate into the vagina inside, basically will not be pregnant. If the short-acting oral contraceptive pill just started to eat, the first box to eat within seven days, this situation can not be ejaculated in the inside, to use a condom additional whole contraception, otherwise there may be accidental pregnancy. If the short-acting oral contraceptives during the pill has missed the phenomenon of eating, also can not be directly shot in the inside, the next week to take the pill every day continuously, with additional condoms throughout the contraception. If it is regular in accordance with the method of use to eat, and the first box has been more than seven days, this situation has a contraceptive effect, you can shoot in the inside.