A woman with a history of multiple uterine curettage procedures is diagnosed with abnormal placental implantation, where the placenta penetrates the uterine wall and extends to surrounding structures. Which pathological feature best explains the underlying cause of this condition?

During antenatal examination, the umbilical cord length is measured to be more than 100 cm. Which complication is most likely associated with this finding?

A laboring woman develops a sudden intrapartum hemorrhage associated with premature rupture of membranes and uterine inversion. Which umbilical cord abnormality most likely contributed to this complication?