A former fertility doctor is being accused of using his own sperm samples to impregnate at least eight of his patients.
The Indiana man, Dr Donald J. Cline, was charged with two counts of obstruction of justice.
While he initially denied the claims, instead accusing the complainants of slander and libel, he has since admitted he used his own sperm at the clinic "about 50 times", according to the affidavit.
Cline has met with six of the siblings, saying he knows what he did was wrong but that he "felt he was helping the women because they really wanted a baby."
He says he felt pressured to use his own samples as fresh sperm was not always available.
The siblings, who had no idea they were related, were united after one of them used an at-home DNA test and discovered they were related to eight other users on the website.
After reaching out to a local news station, subsequent DNA tests were ordered which confirmed the connection.
The tests revealed that the mothers of the siblings were all artificially inseminated at Cline's clinic within an eight year period, beginning in the 1970s.
Cline was charged after he was paternally matched to two of the siblings with probabilities of 99.9997 and 99.998 percent.