Utero is the alternate floor of The Womb, and looks exactly the same. The only difference is the variety of enemies and bosses that appear. This floor was added in the Wrath of the Lamb DLC

EnemiesEdit

• B. Licker
• Baby
• Dople
• Fly
• Fred
• Guts
• Leech
• Mama Guts
• Mask + Heart (Sometimes Hearts appear without masks)
• Para-Bite
• Spiders (Both small and large ones)
• Walking Boil

Boss monsters encountered in normal roomsEdit

• Blastocyst (Medium version)
• Gurdy Jr.
• The Hollow
• Larry Jr.
• The Husk
• Duplicates of Sins
• 2x Gemini

BossesEdit

• The Bloat
• Daddy Long Legs
• Triachnid
• Death
• Lokii
• Teratoma
• Blastocyst
• Mom's Heart/It Lives (Always encountered in Utero II/XL. It Lives replaces Mom's Heart after the game has been successfully completed nine times)

TriviaEdit

• "Uterus" is the Latin word for womb. This spelling indicates that the word is being used in the ablative case, suggesting its use as a location as in the phase in utero, "in the womb."