It is possible to get pregnant even if you have intercourse during ovulation and go in a few times. Theoretically, if sperm enters the vagina, there is a possibility of pregnancy, even if there is no internal ejaculation. When a man has an erection, he secretes prostatic fluid, which contains a few sperm, and this enters the woman’s body during sexual intercourse. In addition, whether or not a woman’s ovulation period is actually accurate varies from person to person. If the sperm in the male prostate fluid enters when the woman ovulates, there is a possibility of pregnancy. Therefore it is still necessary to use reasonable contraceptive measures in order to achieve efficient contraception. If you have intercourse without any contraceptive measures, there is a risk of pregnancy even if you just go in for a bit.