LEGISLATOR Dr Leong Che-hung yesterday criticised the Government for its failure to declare its stand on scientifically assisted human reproduction in a consultation paper to be released today. In the 50-page document to be tabled to the Legislative Council, the Government asks the public to comment on the works of the disbanded committee commissioned in 1987 to study the issue. The committee chaired by Dr Leong has suggested a ban on commercial surrogacy and a controlling body to be set up to register medical institutions among its 22 recommendations. The document asks if the practice should be regulated by a statutory body with a specific piece of legislation, a Government department, a professional body or the courts. The Secretary for Health and Welfare, Mrs Elizabeth Wong Chien Chi-lien, will table the consultation paper to the Legislative Council today and announce it for public consultation. Dr Leong said the consultation paper was not greatly different to an earlier exercise by the disbanded committee. ''Why should the Government spend so much time, from May last year to now, if it just asks public views on the final report prepared by the working party?'' he said. Dr Leong expected the Government to come up with a concrete position on the issue for public consultation. ''I am quite disappointed that the Government so far has not come up with any position,'' he said. He understood it concerned moral issues and urged the public to air their views. The head of one of Hongkong's three in vitro fertilisation (IVF) clinics yesterday questioned the long delay in reaching the public consultation stage. ''I should think that they should have done it earlier,'' said Dr Ho Pak-chung, a reader with Hongkong University's Department of Obstetrics and Gynaecology who is in charge of the University's Assisted Reproduction Team. After receiving the final report of the Committee on Scientific Assisted Human Reproduction in May of last year, Health and Welfare Branch officials said they would study the proposals before inviting public consultation before the end of 1992. Dr Ho said he believes Hongkong's three IVF clinics have been abiding by a voluntary code of practice drawn up by the now defunct Medical and Health Department in 1987. ''I think the concern mainly comes from the public - whether there will be abuse, because there is no legal obligation for a unit to follow the code of practice,'' he said. He added, ''The fact that it works now voluntarily doesn't mean that it's going to work forever.''