Yes, anal sex can spread bacteria (streptococcus fecalis) into the vagina and cause low-grade infections in you and your partner that you may not be aware of, and that may be preventing you from conceiving. Get tested, take antibiotics if needed, and refrain from anal sex while trying to conceive.
Sources: Making Babies, Human Reproduction Update
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Sources: Making Babies, Human Reproduction Update
< Back to Sex for Conception