He's announcement, which has not been verified due to the lack of written materials and He's silence in the matter, sparked an worldwide outcry about the ethnical and safety standards of such report.
Xu said his ministry is strongly opposed to He's actions.
The organizer's of a Hong Kong Conference, where He announced his gene-editing claims, described his work on Thursday as "deeply disturbing" and "irresponsible". Medical advances need to be openly discussed with patients, doctors, scientists and society, he said.
The Second International Summit on Human Genome Editing, taking place this week in Hong Kong, was supposed to be a gathering of researchers and medical professionals for the goal of furthering the scientific and ethical standards of genetic modification.
Biochemist David Liu, the scientist who co-invented the CRISPR/Cas9 technology that He said he used in his experiment, also noted that it was unnecessary."The father is HIV positive and the mother is HIV negative".
"I must apologize, this result was leaked unexpectedly", He Jiankui told a Hong Kong medical conference on Wednesday, as cited by AFP. Eight couples chosen from a list of candidates recommended by Baihualin had agreed to take part in the study, though one later dropped out. "This suggests that the research of gene editing in China not only has a promising potential but also is responding to the public's needs". Scientists and ethicists from around the world have condemned his work stating that this work violates the laws of ethics.
Professor He said there had been "another potential pregnancy" involving a second couple, but it is unclear whether that pregnancy is still ongoing.
"I think the failure was his, not the scientific community", Mr Charo said.
This gene-editing surgery was done to protect the girls from future HIV infection, claims the doctor, by removing the portal through which the AIDS virus infects people.
He added that he had submitted his research to a scientific journal for review and had not expected to be presenting it at the conference.
The MIT Technology Review warned that "the technology is ethically charged because changes to an embryo would be inherited by future generations and could eventually affect the entire gene pool".
When asked by Robin Lovell-Badge, a professor of genetics and embryology at the Francis Crick Institute in London, whether by early stage He meant a "chemical pregnancy" or early miscarriage, He said "yes". In the United Kingdom, editing of embryos may be permitted for research purposes with strict regulatory approval. "This experiment exposes healthy normal children to risks of gene editing for no real necessary benefit", Julian Savulescu, director of the Oxford Uehiro Centre for Practical Ethics at the University of Oxford, UK, said.
"I would be concerned if this initial report opened the floodgates to broader practice", Daley said.
The Chinese government has also ordered an "immediate investigation" into He's claims.
While the technology to change DNA has existed for decades, it has improved vastly in recent years allowing scientists to make very targeted changes.
Beijing-based non-government organization Baihualin (White Birch Forest) said that He Jiankui, who carried out his experiments at the Southern University of Science and Technology in Shenzhen, offered to waive all expenses and sponsor their stay in the Chinese city.