Please how long should the cord last for a new born and is it advisable to do circumcision with an unfallen cord?
Some babies cord take some time to fall, it may take up to 14 - 21 days in some cases, you need to be cleaning with methylated spirit every three to four hours every day ,if still worried or there is sign of infection, kindly see a doctor for further evaluation and treatment .

Unfallen cord has nothing to do with circumcision take your baby to be circumcised