11 Embarrassing Fertility Questions Answered

Lubricants can make intercourse more comfortable and pleasurable, but they aren't conducive to conception. Dr. Mark Leondires, MD, a reproductive endocrinologist with Reproductive Medicine Associates of Connecticut, says, "Oil-based lubricants or any product containing scents or inorganic materials are likely to kill sperm." Lubricants also affect sperm motility, slowing down the swimmers. According to Dr. Leondires, studies have found that all lubricants on the market have some impact. A product called Pre-Seed is marketed as a lubricant for those trying to conceive, but there are no independent studies yet proving that it does not impact sperm.

Dr. Jay Schinfeld, MD, reproductive endocrinologist with Abington Reproductive Medicine in Abington, Pennsylvania, says, "The safest two lubricants are egg whites (to use, take a medium-to-large egg, separate the white, and let it come to room temperature) or olive oil." He points out that salmonella is not a concern with egg whites unless they get in the mouth, so avoid oral sex after the application. Saliva is not harmful to sperm. And sex toys are not a problem, as long as you wash them carefully and avoid contamination from the rectum.