Drooling will not cause a woman to become pregnant, so you can rest assured. Pregnancy requires the entry of male semen into the female vagina, after which the sperm breaks away from the semen and travels through the uterus to the fallopian tubes, where it unites with a mature egg to form a fertilized egg, which then returns to the uterus to implant and complete conception. After implantation, the fertilized egg develops into an embryo, which in turn develops into a fetus that is eventually delivered vaginally. Saliva does not contain sperm, and saliva does not enter the uterus through the mouth, so there are no conditions for fertilization and no pregnancy.