Without a condom, you will not normally get pregnant during a woman’s safe period, if the man has not ejaculated, and if you have sperm abnormalities or infertility. 1. Safe period: Under normal circumstances, pregnancy requires the male sperm and female egg cells to combine to form a fertilized egg, and the fertilized egg successfully implanted in order to be considered a successful conception. If you don’t use a condom and ejaculate inside the body, usually no mature follicular cells are discharged during the safe period, usually not pregnant. But it is not absolute, not through the safe period to contraception. 2. male without ejaculation: sex without condoms, if the man did not ejaculate in the body, the general situation of the chances of pregnancy is not large, but does not mean that 100% will not get pregnant, because the penis erect state of the prostate fluid secreted by a very small amount of semen, there is also the possibility of pregnancy, but the chances are smaller. 3. Sperm abnormalities: for example, weak spermatozoa, azoospermia, necrospermia and other diseases can also lead to decreased chances of pregnancy, or even not be able to get pregnant. 4. Infertility and other diseases: various causes of male infertility, female infertility, etc. without a condom will not get pregnant. If a woman is not ready to get pregnant, she needs to take measures to prepare for pregnancy so as not to harm her body.