In incredible news, scientists have discovered that women's bodies actually have the ability to filter out undesirable sperm in order to avoid genetic issues and create the healthiest babies possible. Findings suggest that each individual woman's reproductive secretions can affect the sperm's performance.
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This information was revealed in a study conducted by researchers from Finland who activated the sperm of eight male donors with either cervical fluid or follicular fluid (the liquid surrounding immature egg cells) extracted from nine women to determine what effect the mucus or fluid would have on the sperm's motility and other factors in the sperm's success.