A member asked:

How is it.possible for people to have unprotected sex and never get pregnant ?

A doctor has provided 1 answer

Infertility: Sounds like someone might be infertile. Unprotected sex with a fertile woman and man will result in pregnancy about 85% over 1 year of regular sex. About 50% at 6 months. Lots of reasons for no pregnancy: no egg, no sperm, few sperm, old sperm, old eggs, egg doesn't like the sperm, sperm misses the egg, fertilization but no implantation, defective embryo, etc. Lots of slip-ups can occur.

Answered 10/4/2015

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