Blue Womb

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Blue Womb.png

???, referred to as Blue Womb or Dead Womb in the OST, is a new chapter added in the Binding of Isaac: Afterbirth expansion. It is unlocked by defeating Mom's Heart for the 10th time.

It is accessed by defeating Mom's Heart or It Lives! within 30 minutes. Leaving and re-entering the Boss Room after the timer has reached 30 minutes will make the entrance to the Blue Womb disappear. If the player is fast enough, both Boss Rush and Blue Womb can be completed in a single run.

It contains the following:

  • 4 golden chests in the main room.
    • Unlike the ones in The Chest, these are just regular golden chests and don't guarantee an item drop.
  • 2 locked Treasure Rooms, both of them offering two choices of items as if More Options was active.
  • A Shop that always contains 6 items, even if Shop Upgrade Lvl. 4 has not been unlocked.
  • A 2x2 boss room that contains Hush.
    • The door leading to the boss room might be confused by players as part of the northern wall, but will slide away upon approaching it.

It is advised to enter the Blue Womb only with very powerful items and/or a set of good dodging skills, because Hush ranks amongst the most difficult bosses of the entire game.

After Hush is defeated, one of two things will happen:

  • If this is the first time Hush has been defeated, a giant golden chest will appear in the middle of the room. Jumping into it ends the run and gives Ending 17.
  • If Hush has been defeated before, a trapdoor and a beam of light leading to Sheol or The Cathedral will appear.
    • If Hush has been defeated before but Sheol and The Cathedral have not been unlocked, the golden chest will appear instead.
    • Added in Afterbirth † Additionally, an exit will spawn in the corner of the room, containing a Portal leading to The Void.

The Blue Womb has its own Devil Room/Angel Room which can be reached via a Red Chest or a Joker card.


Boss Hush.png



The Blue Womb's music is called Mater Prope or Nativitate. The tracks that play during the battle against Hush are called Ascension (the Blue Baby fight music; played during Hush's first phase, which is similar to Blue Baby) and Morituros (during the second phase).


  • The displayed name of the chapter is ???, but the chapter is referred to as Blue Womb by the achievement, using the same logic as the character ???.
  • The character ??? and the Blue Womb have the same unlock requirements.
  • Blue Womb is unique as the only chapter that can be optionally done between mandatory chapters.
  • Blue Womb is the smallest chapter, only containing 5 normally accessible rooms.
  • In Isaac's last will, the Blue Womb is referred to as "some barren place".
  • The names given to the soundtrack which plays in the Blue Womb (Nativitate and Mater Prope) are in Latin, and translate to "Birth" and "Almost Mother", respectively.


Bug Bug! When entering a Devil or Angel Room with a Joker Card, Nativitate (the Blue Womb's normal music) will play instead of the standard Devil/Angel Room music.
Bug Bug! Touching the entrance to Hush's room with a golden key will cause Isaac to be immediately teleported to Hush's Room before the door's animation ends.[citation needed]
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Optional Chapter 5 Chapter 6 Endgame
Normal Mode
Hard mode
Stage basement.png Stage caves.png Stage depths.png Stage womb.png Stage sheol.png

Stage cathedral.png
Stage dark room.png
Dark Room

Stage chest.png
The Chest
The Basement The Caves The Depths The Womb
Added in Afterbirth Added in Afterbirth †
Stage cellar.png Stage catacombs.png Stage necropolis.png Stage utero.png ??? Stage the void.png
The Cellar The Catacombs Necropolis Utero ??? The Void
Added in Afterbirth Added in Afterbirth Added in Afterbirth Added in Afterbirth
Stage burning basement.png Stage flooded caves.png Stage dank depths.png Stage scarred womb.png
Burning Basement Flooded Caves Dank Depths Scarred Womb
Added in Afterbirth
Greed Mode
Added in Afterbirth †
Greedier Mode
Added in Afterbirth Added in Afterbirth
Stage basement.png Stage caves.png Stage depths.png Stage womb.png Stage sheol.png The Shop Ultra Greed
The Basement The Caves The Depths The Womb Sheol The Shop Ultra Greed

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