Umbilical hernia - Symptoms, Causes, Complications and Prevention
Umbilical hernia: Causes, symptoms, and treatments
What's the purpose of belly buttons, nipples (for men) and Adam's apple? If it doesn't have any purposes, why didn't we evolve it out of existence? - Quora
Umbilical cord - Wikipedia
A close up of a newborn males umbilical cord with clamps in place just after the cord had been cut Stock Photo - Alamy
How to get a belly button - Quora
Umbilical Cord | Newborn Nursery | Stanford Medicine
physiology - What happens to our umbilical cord internally as we age? - Biology Stack Exchange
The Umbilical Cord Fell Off, What Should I Do?
How did the original humans survive childbirth and cut the umbilical cord, etc.? - Quora
10 Dads Describe What "Cutting The Cord" Is Actually Like