AN unregistered doctor who carried out an illegal abortion on a 16-year-old girl was yesterday sentenced to 21 months in jail at the High Court. The sentence was imposed by Mr Justice Stock on Lui Man-kit after a jury found her guilty of using an instrument with intent to procure a miscarriage. But the jury acquitted Lui of administering poison with intent to procure a miscarriage. Lui, 54, a Chinese medical school graduate, was also given a three-month concurrent jail term for managing an unregistered clinic and fined $6,000 for possession of a Part 1 poison and antibiotics - offences to which she had pleaded guilty. Mr Justice Stock said the law had made known to all medical practitioners in Hongkong, registered or unregistered, that the termination of pregnancy would be permitted only under special circumstances. The seriousness of the offence was reflected by the fact that the maximum sentence on conviction was life imprisonment, he added. The judge said he accepted that Lui had the skill to treat patients, making the operation less dangerous than if she had had no medical experience. But she had allowed the girl to bleed for hours before she summoned an ambulance, and it was lucky the girl was still alive, he said. Mr Justice Stock was satisfied that Lui had not performed abortions regularly, although she had done so more than once, and financial reward was the prime motive. The court heard evidence called by Senior Crown Counsel Richard Donald that the girl visited Lui's Sheung Shui clinic in November 1991. Lui, who described herself as Dr Lui, confirmed that the girl, who claimed to be 21 years old, was three months pregnant. Lui advised her to keep the baby. The girl returned to the clinic two months later, and Lui again advised against an abortion, but finally agreed to conduct the operation for $4,000 after the girl pleaded with her. The abortion was carried out on January 11 last year. When Lui was unable to stop the girl bleeding after the operation, she called an ambulance. The clinic, which was not registered, was searched the next day and bottles of Part 1 poison and antibiotics were found. Lui claimed that the girl was bleeding when she last visited her clinic. She said the girl had had a miscarriage and she gave her some injections. She denied carrying out an abortion. Her counsel, Joseph Stevenson, submitted that there was no evidence to suggest that Lui, who is now running a trading company, was a professional abortionist. There was a degree of reluctance on her part before she agreed to treat the girl, he said.