They shared a liver, but doctors started the procedure unsure if they also shared a bowel.
Australian surgeons began operating early Friday to separate 15-month-old Bhutanese twins joined at the torso.
Crameri said if there were any unexpected problems during the operation, the hospital had all the resources and experts on hand that it would need. Doctors were able to successfully divided the twins' shared liver in the six-hour long operation.
The girls are likely to spend at least a week in hospital before continuing their recovery at the Children First Foundation retreat in Kilmore, where they were cared for in the lead-up to the operation. "The one benefit we all have is we are all born with a lot of bowel and you can afford to decrease that", the doctor said.
According to Herald Sun, a newspaper based in Melbourne, Nima and Dawa would be taken for surgery after 8am (Melbourne time) on Novermber 9, where they will be known as Green and Red to avoid mix ups.
"In this situation, we have two twins which are largely separate in the way they function, but like all conjoined twins they just have a small area, in this case more towards to abdomen rather than the head which is connected and we're hoping that will be a less complex interdivide", Dr Cameri told Radio 3AW in October.
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"But they're very rarely exposed, you don't get chances against them that much". 'I admire because of his fantastic qualities.
He acted as a translator throughout the procedure for the girls' mother, who spent time praying and meditating.
"There will be challenges over the next 24 to 48 hours as with any surgery", Dr Crameri said.
Conjoined twins are very rare - it is thought one in every 200,000 births - and around 40-60 per cent of these births are delivered stillborn.
Dr Karma Sherub, a pediatric surgeon with JDWNRH, who is now in Melbourne said that the twins look good and have become strong and healthy.
Dr Crameri said it was a "joy" to inform their mother, Bhumchu Zangmo, of the success - saying she had been "very grateful".
The state of Victoria has offered to cover the A$350,000 (US $255,000) cost of the operation. They are expected to return to the Himalayan kingdom, one of the world's poorest nations, after the twins have recovered.