Answers: Soap does not affect fertility rates in any men or women.
Female genitalia may have an allergic or chemical irritation sensitivity to some soap, but it will not affect their fertility. Lack of cleanliness in that nouns may, however, diminish the willingness of a partner to play a part in sexual happenings which in turn, would affect reproduction possibilities.
In males, wearing tight clothing (such as briefs) that holds the testes closer to the body have been shown to lower sperm counts. (The testes requirement to be able to move away and towards the body freely to keep going a proper temperature)
No.