nuchal cord 21wks fetus Diagnostic ultrasound cases

A nuchal cord happens when your baby’s umbilical cord becomes wrapped around their neck in the womb. Nuchal cords are quite common, and while they often do not cause any health problems, in rare cases, serious complications can occur.
If the cord gets wrapped around the neck one or more times, it is called a nuchal cord. The loops can be either loose or tight. Nuchal cords are grouped into types A and B.
Type A nuchal cords (also called unlocked cords) are free-moving and may come undone naturally. Type B nuchal cords (or locked chords) are wrapped in a way that does not allow them to come undone naturally, except for very rare cases.