"We'll take the final decision to separate Saba and Farah only after knowing what the doctors say about their chances of survival," Mohammad Tamanna, the father, said here Tuesday.
Tamanna told IANS that if the doctors at AIIMS said that one of the girls would not survive after the operation, they would not go for the surgery.
"Our stand is clear. We're not ready to lose one of them to save another," he said.
The Supreme Court had Monday asked the Bihar government to make arrangements to bring the teenaged twins by air ambulance from Patna to Delhi for treatment at AIIMS.
Earlier, on the directions of the apex court, the central government formed a three-member team of doctors to examine the possibility of surgically separating the sisters.