Ways of men's Sexual impotency proof and it Jurisprudence and legal study

To prove men's sexual impotency, more than ways mentioned in Jurisprudence, three other ways such as medical certificate, witnesse's testimony of medical certificate and testimony of former or present wives can be added on his impotency. Some legal and juridical effects of this illness can be criticized. It seems that in this illness if it occurs after intercourse, there exists the right of marriage revocation for wife for the damages due to no possible marital relations. And if diagnosed by specialized medical doctor that there exists no treatment of such illness and it is permanent, there will be no need for granting one year moratorium to the impotent man. Therefore if marriage is revoked without moratorium, wife is not entitled to half of dowry. Moreover, the impotency of man with respect to his wife alone will cause revocation of marriage and it will not be necessary to test man's sexual potency with other women.