Justice Choo Han Teck found that the obstetrician, Dr Khoo Chong Kiat, had not been negligent in his diagnosis, treatment and care of Ms Cherissa Cheng. SINGAPORE: A woman who sued her obstetrician for negligence after she sustained injuries following the birth of her child lost her case against the doctor. In a judgment released on Thursday (Apr 3), Justice Choo Han Teck found that the obstetrician, Dr Khoo Chong Kiat, had not been negligent in his diagnosis, treatment and care of Ms Cherissa