Research has show that paw paw adversely affect human fertility. Therefore it's a myth that paw paw can make someone more fertile. Now the question that your friend wants to be blessed with a child. Well I would recommend a complete checkup from a good doctor to rule out the source of the problem. What I mean to say is you need to identify which to the two in the couple has reproductive problems. Once the problem is identified there are many artificial fertility procedures which can help you in this regard.