means your babies buttocks/limbs
are down below near the uterine outlet.
First i would like to assure you that breech presentations at 25 weeks may be normal as the fetus frequently changes its presention. You need not have to worry at all now.
Well a loop of cord round the neck is also seen in babies delivered vaginally, and in majority of cases it doesn't pose any problem if it is not a tight one and the cord is not a too short one.One needs to verify the same finding by ultrasound
again at term and the delivery need to be under supervision. But these are not the things to worry now. Good luck, TAKE CARE