I have just read a journal article and found this about a babies cord having two knots: A cord true knot is very rare, with a probability of occurrence of approximately 0.3%-2%. This occurs when the fetus flips in the amniotic sac and slips through a loop in the umbilical cord. With this in mind, the possibility of formation of two true knots in the birth cord is roughly zero. Sadly the article also stated the following: In addition, even if it occurs, it is almost impossible for the embryo to survive without a developmental disruption or other disorders. These true knots potentially prove fatal. More specifically, true knots can be loose and cause little disturbance to the blood supply to the fetus and only lead to SGA or IUGR, while tight true knots can cause abortion, IUFD intrapartum death, and stillbirth.