The chances of pregnancy in this case are very low when you have intercourse during the safe period and have ejaculated outside the body. Because there is no ovulation during the safe period, it takes 2-3 days for the sperm to die if it is ejaculated into the vagina, and there is no ovulation at this time, so the chances of the sperm combining with the egg are almost zero, so it is clinically impossible to cause pregnancy. However, if you are calculating the safety period, it must be accurate only if your menstrual cycle is regular. Otherwise, if the menstrual cycle is irregular, the calculated safe period is also inaccurate, so that even if you have intercourse during the so-called safe period, it is clinically possible to cause pregnancy.