The former doctor accused of molesting gymnasts, including Olympian Aly Raisman, during his tenure with USA Gymnastics and Michigan State University has entered a guilty plea for multiple charges of sexual assault.

The case comes after Raisman, a six-time Olympic medallist, revealed the abuse in an interview with CBS television’s 60 Minutes. Ms Raisman, who is now 23, was 15 when she was first examined by Nassar.

“I am angry,” she said. “I just want to create change so [that young girls] never, ever have to go through this.”

Nassar, 54, has so far admitted to abusing seven girls. A further 125 victims have come forward.

Nassar, who lost his licence to practice medicine in April of this year, admits that he digitally penetrated the young women under the guise of medical examinations. He has also admitted child pornography charges.

He has expressed remorse for his actions, saying “I pray the rosary every day for forgiveness. I want them to heal. I want the community to heal.”

The plea deal in Michigan dictates a minimum prison sentence of 25 years, but a judge would be at liberty to set a sentence of up to 40 years.

Sentencing has been set for January 12.