Joan Rivers, 81, reportedly is in a medically-induced coma and her distraught daughter Melissa Rivers is anxiously awaiting a prognosis.

Melissa, who starred in the reality series Joan & Melissa: Joan Knows Best with her mother and competed against Joan on The Celebrity Apprentice's second season back in 2009, is expected to hear from doctors at The Mount Sinai Hospital about Joan's condition on Friday, the Daily News reported.

Joan reportedly went into cardiac and respiratory arrest during a routine doctor's visit Thursday morning and doctors are unsure how long she went without breathing. Joan had collapsed and was unresponsive, so EMT's immediately rushed her to the hospital.

Melissa flew to New York from California as soon as she heard, according to the Daily News, and issued a statement that night saying she's thankful to "everyone for the overwhelming love and support" for her mom.

A source told the newspapers Joan's co-workers are also reportedly very worried about the Fashion Police co-host and hoping to receive some news soon.

Joan, who won The Celebrity Apprentice, apparently performed a stand-up comedy routine for a sold-out crowd in Manhattan just 12 hours before the medical incident.