Hello dear,
I understand your concern.
In my opinion the uncoiling of
umbilical cord might not be significant.
It does not have to do anything and I agree with your doctor regarding this.
True knots and false knots are also seen in umbilical cord and that is also not significant.
The only thing which matters is loop of cord around the fetal neck at term
pregnancy.
There can be tight loop or loose loop.
The loose loop might not cause any problem but the tight loop might prevent the
decent of fetus during the labour.
And tight loop might be the cause of failure of progress of labour in that case and caesarian is advised.
So from the above explanation it is clear that uncoiling is not significant.
Hope this helps.
Best regards...Dr.Srilatha