And for future reference, semen is also a natural cure for morning sickness. Biologists agree that the female body initially rejects the pregnancy due to the foreign nature of the semen inside her. The body undergoes this process by inducing the woman to vomit. Studies show that ingesting sperm mediates the affect and reasons that by introducing more sperm into the body, the body will adapt and discontinue this rejection process. Researchers suggest ingesting the sperm of the father is the ideal solution, as swallowing ejaculate of a different man can actually increase the likelihood of miscarriages.