The only way a person can get pregnant is if sperm enters the vagina. So unless she How do teenagers get pregnant? You can get pregnant and swallow sperm, but you cannot get pregnant _from_ swallowing sperm. Jan 14, - Sex during pregnancy can be a dreaded affair for a variety of reasons. Immunology revealed that swallowing sperm may reduce the risk of preeclampsia. Pregnant ladies have needs that go beyond a comfy mattress.