Placenta

Placenta is a passive item.

Effects[]

Grants one full Red Heart container when picked up.
Isaac has a 50% chance to regenerate a Half Red Heart every time the in-game timer hits a new minute (00:01:00, 00:02:00, etc).
Heals 1 additional Red Heart when picked up.

This item can rarely drop from polyps.
The regeneration can happen multiple times in the same room, so there is no need to move between rooms to continue regeneration.
- However, regeneration does not occur when standing in a Crawl Space.
Regeneration will only occur when Isaac has Red Heart containers or something equivalent:
- Keeper's and Tainted Keeper's coin hearts will regenerate, one coin at a time.
- Bone Hearts regenerate like red hearts.
- Consequently, characters with no applicable health -- ???, The Lost, Dark Judas, Tainted Bethany, Tainted Judas, and Tainted Lost—do not benefit from the effect.

Blood Oath: With enough patience, health can be safely restored each floor by waiting in the starting room.
Gnawed Leaf: Regeneration works while turned to stone, allowing Isaac to become invincible and regenerate while in any room.
Sanguine Bond: Can be used indefinitely with placenta’s regen. Also works with normal sacrifice rooms
Sharp Plug: With enough patience, any active item can be reused indefinitely.

A Placenta is an organ that forms from the mother's uterus during pregnancy that supports the fetus during development until it is expelled during childbirth. In some cultures, it is a common practice for the mother and/or child to eat the expelled placenta.
- This, like many other things Isaac does, is medically inadvisable (without proper preparation methods).

Bug!	Going into a Ventricle Razor portal at the same time the effect of Placenta is triggered will cause the effect to trigger in rapid succession, effectively healing Isaac to full health.