light. For a variety of reasons, some patients had arranged to be artificially inseminated with sperm provided by screened, anonymous donors arranged by Jacobson. In order to preserve the anonymity of the donors, Jacobson explained, he identified them in records using code numbers; only Jacobson was to know their true identities. Investigators found no evidence that any donor program actually existed. Some of Jacobson's patients who had conceived through donor insemination agreed to genetic testing. At least seven instances were identified in which Jacobson was the biological father of the patients' children, including one patient who was supposed to have been inseminated with sperm provided by her husband. DNA tests linked Jacobson to at least 15 such children, and it has been suspected that he fathered as many as 75 children by impregnating patients with his own sperm. Aftermath Defense Jacobson vigorously denied wrongdoing. He offered these explanations: With regard to the "false pregnancy" cases, he had believed that the women had actually been pregnant, and continued to maintain that some of them really were pregnant. He was well aware that injected hCG could trigger a false positive on a pregnancy test, but thought that the dosages he administered were too low to have that effect. If he misread the ultrasound results, that was an honest error. As for the donor insemination, Jacobson maintained that he had in fact relied on anonymous donors as claimed. He acknowledged using his own sperm on some occasions, when donors failed to show up when needed, and a patient was about to miss a window of opportunity to become pregnant. He could not account for the incident in which his own sperm was used in place of the patient's husband's, other than to suggest cross-contamination in the laboratory. Sentence In 1992, Jacobson was convicted of 52 counts of mail fraud, wire fraud and perjury. He was sentenced to five years in prison and had his medical license revoked. Jacobson appealed his convictions and sentence, but they were upheld by the court of appeals. He later moved to Provo, Utah, where he was involved in agricultural research. "Awards" He was awarded the Ig Nobel Prize for Biology in 1992, which cited him as "Dr. Cecil Jacobson, relentlessly generous sperm donor, and prolific patriarch of sperm banking, for devising a simple, single-handed method of quality control." In the media Elements of the case were echoed in