A HEAVILY-PREGNANT teenager yesterday admitted trafficking in more than 150 grams of heroin, mostly found hidden in her mother's and grandparents' homes. Ng Ka-yee, 17, who is due to give birth next month, pleaded guilty to three counts of trafficking in a dangerous drug. In view of her age, Deputy High Court Judge Burrell deferred sentence until May 23 for reports. Prosecutor Edward Brook said Ng was stopped by police on patrol on December 13, 1992, at Shekkipmei Estate. A total of 6.17 grams of heroin was found in her handbag and a subsequent search of her mother's Kai Yip Estate home yielded a further 120.95 grams. Later that evening, police also raided her grandparents' flat at Choi Hung Estate where another 36.38 grams were found.