Final answer:
About 30% of babies are born with a nuchal cord. The umbilical cord connects the fetus to the placenta and is cut after birth, later forming the navel.
Step-by-step explanation:
About 30% of babies are born with a nuchal cord, which is a condition where the umbilical cord is wrapped around the baby's neck. The umbilical cord, a long, narrow conduit that connects the fetus to the placenta, plays a crucial role during pregnancy by supplying the developing baby with oxygenated blood and nutrients. However, during the birthing process, the umbilical cord can sometimes wrap around the infant's neck, although in most cases, this is not a cause for alarm. Healthcare professionals are trained to handle such situations during delivery. After the birth, the umbilical cord is double-clamped and cut, and within a few weeks, the remaining stub dries out and falls off, leaving what we commonly refer to as the navel.