The first one or two days of sexual intercourse is generally not pregnant, but can not be excepted in special circumstances.
For menstruation just clean a day or two for women, it is in the early stages of follicular growth and development, the volume of follicles at this time are relatively small, generally will not have a mature egg discharge, so the probability of pregnancy at this time of sexual intercourse is relatively small. But for women who usually have irregular periods, it is possible to ovulate at this time, the sperm and egg may be combined, so there is still a possibility of pregnancy.
The uterine cavity may have a small amount of blood in the first one or two days after menstruation, and the uterus is still not fully recovered, so it is not recommended to have sex at this time, so as to avoid the occurrence of a small amount of vaginal bleeding or increase the occurrence of vaginitis, pelvic inflammation and other gynecological inflammatory diseases. For couples who do not want to have children, do not take a chance, should be through the condom, short-acting contraceptive pills and other safe ways to do a good job of contraception.