Chimpanzee Umbilical Cord Care: Natural Detachment and Maternal Behavior

Chimpanzees (Pan troglodytes) do not cut or tie the umbilical cord. The process is entirely natural:

1. Birth: Infant delivered; cord intact.
2. Maternal severance: Mother bites/chews through the cord, leaving a 2–5 cm stump on the infant.
3. Placental delivery: Usually within 10–30 min; mother may eat placenta (placentophagy).
4. Stump drying: Cord stump desiccates and separates in 3–7 days (similar to humans).
5. No intervention: No antiseptics, clamps, or dressings applied.

Evolutionary Context

This mirrors the likely ancestral hominin pattern. Human cultural practices (clamping, cutting, antisepsis) reduce infection risk in non-sterile environments but are not biologically mandatory.

Comparison

• Humans: sterile clamp/cut → antiseptic (chlorhexidine) → dry stump → separation 5–15 days.
• Chimpanzees: maternal bite → no antiseptic → separation 3–7 days.

Both achieve healing; human protocol minimizes omphalitis in hospital/settings with high pathogen load.