Dr. Fetus

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Item icon
Item altar
Table dividing line 1.png
Character appearance
Tear appearance
Table dividing line 2.png
Treasure Room Treasure Room
Greed mode only Treasure Room Treasure Room
Table dividing line 3.png
Added in Afterbirth(page 1, column 11, row 3)
Removed in Afterbirth(page 1, column 1, row 6)
A Fetus in a Jar Defeat Mom's Heart 9 times

Dr. Fetus is a special unlockable passive item.

Effects[edit | edit source]

  • Tears are replaced with bombs that explode approximately one second after being fired.
    • Removed in Afterbirth Each bomb deals 3 times the character's normal tear damage.
    • Added in Afterbirth Each bomb deals 5 times the character's normal tear damage plus a flat 30 damage. The flat 30 is not affected by damage multipliers.
    • Tears down: Delay * 2.5.
    • The range and shot speed stats both affect the velocity at which the bombs are fired out. Delay before the explosion is not affected by either.

Notes[edit | edit source]

  • Dr. Fetus overrides multiple tear effect items but benefit from some (but not all) bomb-enhancing effects like Mr. Mega Mr. Mega.
    • Added in Afterbirth Many more synergies have been added, and all passive bomb modifiers affect Dr. Fetus.

Synergies[edit | edit source]

  • Added in Afterbirth †Apple! Apple! / Added in Afterbirth †Euthanasia Euthanasia: Damage multiplier may be applied to the non-flat damage without a visual difference. Euthanasia bombs do not retain the instant kill ability.
  • Added in Afterbirth †Angelic Prism Angelic Prism: When bombs pass through the prism, they will be quadrupled.
  • Blood Clot Blood Clot / Chemical Peel Chemical Peel: Bonus damage has a 50% chance of happening. Blood Clot colors the affected bombs red.
  • Bobby-Bomb Bobby-Bomb / Added in Afterbirth Homing tears: Bombs home in on enemies.
  • Added in Afterbirth Cricket's Body Cricket's Body: Bombs split outwards into 4 tiny bombs, which detonate almost immediately.
  • Added in AfterbirthExplosivo Explosivo: Bombs fired have a chance to stick to an enemy, much like Added in AfterbirthSticky Bombs Sticky Bombs.
  • Fire Mind Fire Mind / Added in Afterbirth Hot Bombs Hot Bombs: Bombs leave behind a fire that damages enemies on contact after exploding, and bombs themselves deal 1 point of damage on contact.
  • Added in Afterbirth †Haemolacria Haemolacria: Significantly increased tear delay. Isaac fires a large arcing tear reminiscent of a bomb that scatters into 3-5 bombs that explode simultaneously.
  • Added in AfterbirthIncubus Incubus: The Incubus will fire out bombs that, despite being visually smaller, have normal damage and explosion range.
  • Ipecac Ipecac: Isaac is immune to his bomb shots (not explosives or placed bombs) and the damage is massively increased, as the +40 damage from Ipecac is run through the damage multiplier of Dr. Fetus. Shots will also explode immediately on impact with enemies, rocks or walls.
  • The Ludovico Technique The Ludovico Technique: Bomb can be controlled before exploding, similar to Epic Fetus Epic Fetus. Isaac does not shoot bombs while controlling it.
  • Added in Afterbirth Monstro's Lung Monstro's Lung: Shoots 6 bombs that need to be fully charged before firing. The bombs detonate simultaneously.
  • Mr. Mega Mr. Mega: Adds 25 flat damage to bomb explosions.
  • Added in Afterbirth Mysterious Liquid Mysterious Liquid: Exploding bombs leave behind a large pool of creep.
  • Added in Afterbirth †Nose Goblin Nose Goblin: Bombs shot out can randomly become homing.
  • Added in Afterbirth The Parasite The Parasite: Upon exploding, bombs split into two other bombs, which explode almost immediately and deal a flat 24 damage.
  • Removed in Afterbirth Poison tears: Poison effects will give bombs a flat +50 damage. This is guaranteed by Ipecac Ipecac, Bob's Curse Bob's Curse, and Scorpio Scorpio, and can also proc from The Common Cold The Common Cold or Pinky Eye Pinky Eye.
    • Added in Afterbirth No damage increase from poison.
  • Polyphemus Polyphemus: Bombs increase in size and do increased damage.
    • Added in Afterbirth Bombs become Mr. Mega Mr. Mega bombs, which adds 25 flat damage to explosions. After they explode, they leave behind a regular-sized bomb that deals 60 flat damage, much like a traditional bomb.
  • Proptosis Proptosis: Doubles damage with no penalty for distance.
  • Remote Detonator Remote Detonator: Bombs can be detonated early, making it easier to hit moving enemies. They will eventually explode on their own, unlike ordinary bombs, however.
  • Added in AfterbirthTech X Tech X: A laser circle forms around the bomb.
  • Tough Love Tough Love: Damage multiplier may be applied to the non-flat damage without a visual difference.
    • Added in Afterbirth / Removed in Afterbirth † Tears that would have fired a tooth shot instead become a bomb with the Mr. Mega Mr. Mega effect, adding a flat 25 damage and shaking the screen.

Interactions[edit | edit source]

  • Anti-Gravity Anti-Gravity: Overriden by Dr. Fetus. Tear delay decrease is still applied.
  • Brimstone Brimstone: Overriden by Dr. Fetus.
    • Added in Afterbirth: Isaac continuously fires bombs while charging the blood laser. Overrides Azazel's blood laser.
  • Chocolate Milk Chocolate Milk: Bombs can't be charged, but reduces Isaac's tear delay by 20%.
  • Cricket's Body Cricket's Body: Stat effects apply, but bombs do not split. Not recommended, as the greatly reduced range can make self-damage likely.
    • Added in Afterbirth Upon exploding, bombs split into four small bombs that are not affected by Isaac's bomb modifiers. Stat effects are still applied.
  • Added in Afterbirth †Compound Fracture Compound Fracture: No effect, but range increase is still applied.
  • Epic Fetus Epic Fetus: Overrides Dr. Fetus.
  • Added in Afterbirth † The Forgotten: A live bomb will spawn on top of The Forgotten when he starts charging his attack. The Forgotten will toss bombs after releasing the charge, airborne bombs deal 1.5x his damage if they collide with an enemy with enough speed. Max distance is obtained with minimal charge. If the bomb explodes while charging, a normal ranged bone attack happens after releasing it. The melee attack is unaffected.
  • Added in AfterbirthTear Detonator Tear Detonator: No effect.
  • Guppy: Dr. Fetus Bombs exploding do not spawn flies.
  • Added in AfterbirthKidney Stone Kidney Stone: Not recommended. The range decrease applies, but since the tear height stat doesn't affect Dr. Fetus' bombs, they spawn directly in front of Isaac, making self-damage very likely.
  • Added in Afterbirth †Lachryphagy Lachryphagy: Overridden by Dr. Fetus.
  • Added in Afterbirth †Lead Pencil Lead Pencil: Overridden by Dr. Fetus.
  • A Lump of Coal A Lump of Coal: No damage increase.
  • Added in AfterbirthMarked Marked: Overridden by Dr. Fetus. Tear delay decrease is still applied.
  • Removed in Afterbirth Monstro's Lung Monstro's Lung: Same effect as 20/20 20/20, except retains fire rate.
    • Ipecac + Monstro's Lung Monstro's Lung: Not recommended. Isaac is no longer immune to his own bombs, and since they explode as soon as they make contact, it makes self-damage very likely.
  • Mom's Eye Mom's Eye: Grants a chance to shoot an extra bomb from the back of Isaac's head.
  • Mom's Knife Mom's Knife: Overrides Dr. Fetus.
    • Added in Afterbirth Isaac continuously fires bombs while charging the knife.
    • Mom's Knife + Added in AfterbirthIncubus Incubus: The Incubus loses the ability to fire out bombs.
  • My Reflection My Reflection: Not recommended, as bombs lose momentum and slide back towards Isaac, making self-damage very likely.
  • Removed in Afterbirth The Parasite The Parasite: No effect.
  • Piercing tears / Spectral tears: Using piercing/spectral tears is not recommended as it will make aiming at and killing enemies or destroying obstacles more difficult.
  • Added in Afterbirth †Pop! Pop!: Overridden by Dr. Fetus.
  • Added in Afterbirth Sad Bombs Sad Bombs: Fires tears as normally placed Sad Bombs would.
  • Added in AfterbirthSticky Bombs Sticky Bombs: Bombs stick to enemies, but enemies killed by the bomb will not spawn Blue Spiders.
  • Technology Technology: Overriden by Dr. Fetus.
    • Added in Afterbirth Both bombs and lasers are fired.
  • Added in Afterbirth †Technology Zero Technology Zero: Overridden by Dr. Fetus.
  • Tiny Planet Tiny Planet: Not recommended. Bombs fly uncontrollably around the player, making self-damage very likely.
  • Added in Afterbirth †Trisagion Trisagion: Overridden by Dr. Fetus.

In-game Footage[edit | edit source]

Gallery[edit | edit source]

Trivia[edit | edit source]

  • The Dr. Fetus and Epic Fetus items are based on Dr. Fetus, the main villain in Super Meat Boy which is a game by Edmund McMillen (the creator of The Binding of Isaac: Rebirth).
  • This item is used in Demo Man (challenge #9).
  • In the original The Binding of Isaac, Dr. Fetus was unlocked by beating Mom's Heart five times instead of nine.

Seeds[edit | edit source]

 PC  Normal and hard modes only KP6M WZAJ (Treasure Room adjacent to spawn)

 PC  Normal mode only 9LCJ RQG8 (Treasure Room adjacent to spawn)

 PC  Added in Afterbirth † RX1E JBV9 (First floor Treasure Room)

 PS4  Added in Afterbirth † Normal mode only BGGY NWTC (First Treasure Room)

Bugs[edit | edit source]

Bug Bug! Removed in Afterbirth †The black ring generated from the synergy of Dr. Fetus and Tech X behaves as a Maw of the Void ring and may cause black hearts to drop.

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