(CNN) On the eve of former USA Gymnastics team doctor Larry Nassar's sentencing for sexually abusing girls in his care, American gymnast Simone Biles has come forward to say me, too. 
 
 "I, too, am one of the many survivors that was sexually abused by Larry Nassar," she said Monday afternoon in a Twitter post with the hashtag #MeToo. 
 
 "There are many reasons that I have been reluctant to share my story, but I know now that it is not my fault." 
 
 Nassar was the team doctor for USA Gymnastics through four Olympic Games, treating young hopefuls and gold medal winners. His case illustrates the drive of the #MeToo movement to call out serial predatory behavior and the forces that enable it. 
 
 This experience 'does not define me' 
 
 More than 140 female athletes said they were abused by the once-respected doctor, including Aly Raisman Gabby Douglas and McKayla Maroney , members of the "Fierce Five" US Olympic gymnastics team that won the gold in 2012. Many said they were pressured into silence by powerful institutions, including USA Gymnastics, the sport's governing body in the United States. 
 
 In response to Biles' statement, the organization pledged "unwavering" support for Biles and others who have "courageously" come forward. 
 
 "USA Gymnastics is absolutely heartbroken, sorry and angry that Simone Biles or any of our athletes have been harmed by the horrific acts of Larry Nassar," the group said. "We are our athletes' advocates. USA Gymnastics will continue to listen to our athletes and our members in our efforts of creating a culture of empowerment with a relentless focus on athlete safety every single day." 
 
 Biles, now 20, joined the US Olympic gymnastics team in 2016, winning the individual all-around. Though her statement did not include specific allegations against Nassar, she described experiencing abuse under the guise of "special treatment," a recurring claim from Nassar's victims. 
 
 "This behavior is completely unacceptable, disgusting, and abusive, especially coming from someone I was TOLD to trust," she said Monday. 
 
 She, too, called out USA Gymnastics for its alleged role in allowing Nassar to prey on young girls for decades. 
 
 "For far too long I've asked myself 'Was I too naive? Was it my fault?' I now know the answer to those questions. No. No. It was not my fault. No, I will not and should not carry the guilt that belongs to Larry Nassar, USAG, and others. 
 
 "After hearing the brave stories of my friends and other survivors, I know that this horrific experience does not define me." 
 
 Dozens of victims expected to speak 
 
 Nassar faces sentencing on Tuesday in Michigan state court after pleading guilty in November to seven counts of criminal sexual conduct. He faces additional sentencing later this month on three counts of criminal sexual assault involving victims in a neighboring county. 
 
 He worked at Michigan State University from 1997 to 2016 as an associate professor, and he served as the gymnastics and women's crew team physician. In his plea , Nassar admitted to sexually abusing patients under the guise of providing medically necessary treatment in instances as far back as 1998, some of which involved girls under 13. 
 
 Several days have been set aside in Nassar's sentencing for victim impact statements. At least 88 people are expected to speak, according to the Michigan Attorney General's Office. 
 
 At his plea hearing, Nassar apologized and compared his crimes to "a match that turned into a forest fire." 
 
 Allegations of a culture of complicity 
 
 Biles' teammates and others have repeatedly accused USA Gymnastics of complicity in Nassar's abuse. In 2017, the organization said it would implement 70 policy change recommendations from an independent investigator. 
 
 In a lawsuit , Maroney said USA Gymnastics paid her to be quiet about the abuse, which she said began when she was 13. 
 
 University of Oklahoma gymnast Maggie Nichols said she and a coach reported abuse by Nassar to USA Gymnastics in 2015, a few years after Nassar began treating Nichols for a back injury. USA Gymnastics said it hired an independent investigator to look into her allegations. 
 
 Raisman said she was first treated by Nassar when she was 15. She called for a thorough investigation of a system that she said enabled a "monster" to thrive for decades by silencing victims. 
 
 On Monday, Raisman praised Biles for coming forward and vowed to stand with her. 
 
 "I know we will all get through this together," Raisman said on Twitter 
 
 In her statement Monday, Biles said she hoped for the kind of reckoning that would prevent serial predators from striking again. 
 
 "We need to know why this was able to take place for so long and to so many of us. We need to make sure something like this never happens again." 
 
 Correction: Earlier versions of this story incorrectly indicated that Biles was a member of the 2012 Olympic team. She was a member of the 2016 team. ||||| Breaking News Emails Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings. 
 
 / Updated By Tracy Connor 
 
 Simone Biles, the golden girl of the 2016 Olympics, added her name Monday to the list of gymnasts who say they were molested by team doctor Larry Nassar. 
 
 The revelation came in a long statement on her social media accounts — one day before a weeklong sentencing hearing at which Nassar will hear from nearly 100 victims. 
 
 "Most of you know me as a happy, giggly and energetic girl. But lately ... I've felt a bit broken and the more I try to shut off the voice in my head the louder it screams," Biles wrote in a #metoo post. 
 
 Simone Biles says she was molested by Larry Nassar. 
 
 "I am not afraid to tell my story anymore. I too am one of the many survivors that was sexually abused by Larry Nassar," she continued. 
 
 "For too long I have asked myself, 'Was I too naive? Was it my fault?' I now know the answers to those questions. No. No, it was not my fault. No, I will not and should not carry the guilt that belongs to Larry Nassar, USAG [USA Gymnastics], and others." 
 
 Biles' statement follows similar disclosures from three members of the 2012 "Fierce Five" team — McKayla Maroney, Aly Raisman and Gabby Douglas. They are not expected to be at Nassar's sentencing, but 2000 Olympian Jamie Dantzscher will testify at the marathon hearing. 
 
 Hour by hour, Dantzcher and others will deliver victim impact statements — describing how they gave their trust to Nassar and were betrayed by a "monster" who violated them with ungloved hands, using his reputation and invasive "treatments" to mask serial sexual assaults. 
 
 "What people need to understand is these aren't just anonymous people," said Rachael Denhollander, the first woman to publicly accuse Nassar in the summer of 2016. 
 
 "These were real little girls, some of them as young as 6 years old," Denhollander told NBC affiliate WOOD of Grand Rapids, Michigan, on the eve of the hearing. "These were real young women who are suffering devastating consequences now, and this could have been avoided." 
 
 Some of the victims are certain to blame not just Nassar but USA Gymnastics, which made him an Olympic team doctor, and Michigan State University, where he had his sports-medicine practice until the scandal erupted in the summer of 2016. 
 
 Both are accused of giving Nassar unfettered access to vulnerable girls and women, ignoring signs or complaints of sexual misconduct, and trying to silence victims. 
 
 Nassar, 54, pleaded guilty in Ingham County, Michigan, to sexually assaulting seven girls, but the judge is allowing all of his accusers to speak. More than half of those who have filed complaints are expected to give a statement. 
 
 Some will stand at a podium and speak directly to Nassar, who is expected to be sitting in the witness box. Others have sent audio recording that will be played in the courtroom. Still others have sent written statements that will be read aloud by a prosecutor. 
 
 They include elite athletes who were told that Nassar could help make their gold medal dreams come true and ordinary patients who felt privileged to be seen by a doctor whose office was filled with photos of him with Olympic champions. 
 
 "I hope I can look him in the eye," said Jeanette Antolin, a former national team member who says she was abused repeatedly from 1997 to 2000. "I don't want him to feel like he has any more power over me, so I'm going to stay as strong as possible." 
 
 Antolin said she's not interested in what Nassar has to say at the sentencing. She thinks that his previous statements rang hollow and that he hasn't really accepted guilt. 
 
 "I heard what he had to say the last time, and it basically made me sick to my stomach," she said. "His words meant nothing. His apologies meant nothing." 
 
 Denhollander, who was just 15 when she was Nassar's patient in 2000, said her message is not just about Nassar but about the people she believes could have stopped him — officials at USA Gymnastics and Michigan State. 
 
 A mountain of lawsuits filed against the university say that a teenage gymnast reported Nassar's disturbing procedures to coach Kathie Klages in 1997 but that no action was taken against him. 
 
 "Had MSU handled those reports of sexual assault properly in 1997 we wouldn't have have 93 victims coming forward to speak," Denhollander said. 
 
 Klages also defended Nassar to MSU gymnasts after the Indianapolis Star uncovered two complaints against him in August 2016, and she asked the college students to sign a card for him while he was suspended. 
 
 The university has asked for the dismissal of lawsuits by Nassar's accusers, contending that as a government entity it has immunity and arguing that anyone who received complaints over the years was not Nassar's supervisor and thus not the right person to take action. 
 
 "They don't deny that four young women had complained in graphic detail about Larry's procedure," Denhollander said. "What they say is they didn't complain to the proper people." 
 
 MSU has said that it cannot comment on pending litigation but that an attorney it hired to investigate reported that "the evidence will show that no MSU official believed that Nassar committed sexual abuse prior to newspaper reports in the summer of 2016." 
 
 There have been calls for President Lou Anna Simon to step down, and Michigan Attorney General Bill Schuette, who is running for governor, may launch an investigation to determine whether any university personnel beyond Nassar bear criminal responsibility. 
 
 USA Gymnastics, meanwhile, has come under fire from some its biggest stars — Raisman and Maroney among them, who say that after they told a private investigator about their sessions with Nassar, the organization tried to keep them quiet. 
 
 The group's president, Steve Penny, was forced out last year because of the handling of the Nassar allegations and other sexual abuse cases, but some have demanded a complete housecleaning of leadership. 
 
 USA Gymnastics has beefed up its protocols for handling misconduct complaints, but it has also hit back at criticism from its Olympic alumnae and tried to shift blame to the FBI, which was called in to investigate to Nassar. 
 
 In a statement Monday night, USA Gymnastics said it was "absolutely heartbroken, sorry and angry that Simone Biles or any of our athletes have been harmed by the horrific acts of Larry Nassar." 
 
 Nassar's plea deal in Ingham County calls for him to get up to 40 years in prison. He faces another sentencing for three sexual assault victims in Eaton County, and he's already been sentenced to 60 years in federal prison for possession of child pornography. 
 
 Rachael Denhollander, far left, and Jeanette Antolin, second from right, are among dozens of women who will testify at Larry Nassar's marathon sentencing hearing. Mike Clark / The Grand Rapids Press via AP file 
 
 The victim statements won't change the fact that Nassar is likely to spend the rest of his life behind bars, but the hearing will provide a platform for girls and women to tell their stories for the first time — now in the midst of the #metoo movement. 
 
 "It's important that the message of not just the consequences of sexual abuse but the consequences of enabling sexual abuse are heard loud and clear," Denhollander said. 
 
 "Every time something like this happens, the question is what can we do better, how can we prevent it? And we have one of the best examples here of what we could have done better and how it could have been prevented here. And if we don't learn from this example, the cycle will just continue."
– American Olympic superstar Simone Biles added her name to the list of women who say they were molested by former USA Gymnastics team doctor Larry Nassar Monday, CNN reports. In a statement released on her Twitter account alongside the hashtag "MeToo," the four-time Olympic gold medalist wrote, "I, too, am one of the many survivors that was sexually abused by Larry Nassar … For far too long I've asked myself 'Was I too naive? Was it my fault?' I now know the answer to those questions. No. No. It was not my fault. No, I will not and should not carry the guilt that belongs to Larry Nassar, USAG, and others." Biles' revelation comes one day before Nasser begins a weeklong sentencing hearing. In November he pled guilty to seven counts of criminal sexual misconduct, but the judge has decided to let all of his accusers speak, NBC News reports. Nearly 100 women are expected to speak or deliver audio recordings. Biles did not say if she would attend the hearing. Biles is the fourth member of the triumphant "Fierce Five" 2016 women's Olympic gymnastics team to make allegations of abuse against Nassar. Hearing her teammates' stories, she wrote, inspired her to come out with her own: "After hearing the brave stories of my friends and other survivors, I know that this horrific experience does not define me."