It is also possible for a woman to become pregnant if she has had unprotected sex 11 days before her period. For women with regular periods, the menstrual cycle usually lasts 28 days, and ovulation occurs about 14 days before the next menstrual period, which may be longer or shorter for women with irregular periods. During ovulation, the egg is discharged from the ovary and enters the fallopian tube to wait for fertilization, so it is possible to conceive if you have sex in the days before and after the egg is discharged. In general, you can also observe whether you are ovulating based on the changes in your leukorrhea. Just after menstruation, the leukorrhea is white, small amount, paste-like; about to ovulate, by the cervical gland secretion, leukorrhea increased, transparent, slightly sticky, egg white, and can stretch to about 10cm; ovulation 2-3 days later, the leukorrhea becomes turbid, more viscous and less. In addition to women can not have sex during menstruation, after menstruation have had sex have the possibility of pregnancy, 11 days before menstruation pregnancy risk is higher, if there is no requirement for pregnancy, it is recommended to do a good job of contraceptive measures. The first choice of contraception is condoms, which can not only prevent sexually transmitted diseases and contraception, but also reduce inflammation. If you have any symptoms of physical discomfort, you should go to the hospital and consult a physician for guidance.