The first time you have sex and have ejaculation or no ejaculation, although the hymen is not ruptured, there is also the possibility of pregnancy, mainly because: 1, the size of the hymen hole varies from person to person, some people hymen hole is relatively large, even if there is sexual intercourse, the hymen may not appear to be broken. 2, if there is no ejaculation or penis did not enter the vagina, as long as there is a secretion of the prostate fluid may be The reason for this is that prostate fluid contains a small amount of sperm, and once the sperm is discharged from the penis and enters the vagina, it may move quickly to reach the cervix, enter the uterine cavity and then reach the fallopian tubes to get pregnant, so if you don’t have your period by the time you have your period, you will need to do an early pregnancy test to rule out the possibility of pregnancy.