Near the time of ovulation, the man for to produces semen, we usually advise masturbation because it is the best method for semen production. Men who do not want to masturbate can use a specialized condom during intercourse or interrupt ejaculation during normal intercourse and put the semen in the sterile clean container provided; in some situation donor sperms are used. The semen sample is washed in the laboratory to concentrate the sperm (seminal plasma can cause severe cramping if injected directly). The woman lies on the examination couch and a speculum is inserted into the vagina to show the cervix. A soft rubber catheter is inserted into the uterus through her cervix and the washed sperm in injected. The woman is allowed to rest on the examination couch for a few minutes.