Commissioner of Welfare v. Simon

Although respondent-appellant admitted having repeated acts of sexual intercourse with petitioner for a four-year period preceding the birth of the child and continuing after the child was born, his defense in this filiation proceeding is predicated on a contention that he was sterile at the time of conception and therefore incapable of fathering the child. In substantiation of that defense, appellant offered the testimony of a physician who claimed to be a specialist in venereal diseases. After expressing skepticism as to that physician’s qualifications to testify in the field of fertility…