Blighted Ovum

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	Boss; ; ; Double Trouble; ; Mini-Boss; ;
	Boss

The Blighted Ovum is one of the bosses that can appear in The Cellar, and is the posthumous version of Gemini.

Behavior[edit | edit source]

The Blighted Ovum starts off separated into two parts.

Suture is invincible and slowly floats towards the player, firing a horizontal Brimstone
Tears are replaced by a laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.
shot whenever the player is to its left or right. He can't die until Contusion does.
Contusion constantly chases the player and progressively gets faster, while leaving behind a trail of Red Creep. Unlike Gemini he will not stop for breath, only slow down.

Suture can be rerolled by the D10
Rerolls the enemies in a room. Only rerolls enemies that are still alive (does not spawn new enemies).
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Suture can be killed by Little Horn
Adds a chance to fire a piercing tear that instantly kills any enemy that it touches.
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The Blighted Ovum was added in the Wrath of the Lamb DLC for the original Binding of Isaac.
In medicine, a blighted ovum is a pregnancy in which the early pregnancy appears normal on an ultrasound scan, but later no visible embryo develops.
This boss has skin on its body in the boss art, but it doesn't in-game.
Blighted Ovum is the only boss in Chapter 1 that is a posthumous version.
- Gemini also shows up in Chapter 1, which makes it one of only three bosses to have its posthumous version in the same chapter, the other cases being Polycephalus and Chub having The Stain and Carrion Queen, respectively, in Chapter 2.
  - However, Blighted Ovum doesn't appear in the same environment as Gemini, who appears in the The Basement while Blighted Ovum appears in the Cellar.
If encountered in a Double Trouble boss fight, its Brimstone
Tears are replaced by a laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.
laser can damage the other boss.

Bosses
Chapter 1	Blighted Ovum • Dingle • The Duke of Flies • Famine • Fistula • Gemini • Gurglings • The Haunt • Larry Jr. • Monstro • Pin • Steven • Widow Dangle • Little Horn • Rag Man • Turdlings
Chapter 2	Carrion Queen • C.H.A.D. • Chub • Dark One • Gurdy • Gurdy Jr. • The Hollow • The Husk • Mega Fatty • Mega Maw • Peep • Pestilence • Polycephalus • The Wretched The Forsaken • The Frail • The Stain Big Horn • Rag Mega
Chapter 3	The Adversary • The Bloat • The Cage • The Gate • Gish • Loki • Mask Of Infamy • Monstro II • War • Mom Brownie Sisters Vis
Chapter 4	Blastocyst • The Bloat • Conquest • Daddy Long Legs • Death • Lokii • Mama Gurdy • Mr. Fred • Scolex • Teratoma • Triachnid • Mom's Heart • It Lives Sisters Vis • The Matriarch
Blue Womb	Hush
Chapter 5	Satan • Isaac
Chapter 6	??? • The Lamb • Mega Satan
Greed Mode	Ultra Greed Ultra Greedier
The Void	Delirium
Chapters 1-4	The Fallen • The Headless Horseman