Hello dear Understand your concern Pregnancy is not possible by swallowing of sperm. In conception method: Women egg is released from the ovum during time of ovulation. Ovary lies at the ends of ovary and released are taken by the tubes. Now sperm through ejaculation enter in to the uterus, travels through and reach the tube to fertilize the egg and then implantation take place in the uterus. But during swallowing of sperm it can not reach to the tube. So there is no connection between gastrointestinal tract and female genital tract. Swallowed sperm only goes out through rectum. So swallowed sperm can not find the eggs and no pregnancy. But in your act there is penetrative sexual intercourse, in which pre ejaculatory fluid that contain some sperm and by which pregnancy is possible. Pre ejaculotry fluid release in the vagina unknowingly. So pregnancy is possible through pre ejcaultory fluid in your act but not by swallowed sperm. Hope this explanation will help you Best regards Dr. Sagar