Dr. Fetus

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Dr.   Fetus
Removed in RepentanceItem icon
Added in RepentanceItem icon
Item altar
"???"
Table dividing line 1.png
Item ID
5.100.52
Character Appearance
Character appearance
Tear Appearance
Tear appearance
Table dividing line 2.png
Table dividing line 3.png
Collection Grid
Removed in Afterbirth(page 1, column 1, row 6)
Added in Afterbirth(page 1, column 11, row 3)
Unlock Method
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 / Removed in Repentance 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.
    • Added in Repentance Each bomb deals 10 times the character's normal tear damage.
    • 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.
    • Added in Repentance Bombs grow larger or smaller with tear size modifiers and deal no knockback to each other.

Notes[edit | edit source]

  • Dr. Fetus overrides multiple tear effect items but benefit from some (but not all) bomb-enhancing effects like 15►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 †15►Apple! Apple! / Added in Afterbirth †15►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 †15►Angelic Prism Angelic Prism: When bombs pass through the prism, they will be quadrupled.
  • 15►Blood Clot Blood Clot / 15►Chemical Peel Chemical Peel: Bonus damage has a 50% chance of happening. Blood Clot colors the affected bombs red.
  • 15►Bobby-Bomb Bobby-Bomb / Added in Afterbirth Homing tears: Bombs home in on enemies.
  • Added in Afterbirth 15►Cricket's Body Cricket's Body: Bombs split outwards into 4 tiny bombs, which detonate almost immediately.
  • Added in Afterbirth15►Explosivo Explosivo: Bombs fired have a chance to stick to an enemy, much like Added in Afterbirth15►Sticky Bombs Sticky Bombs.
  • 15►Fire Mind Fire Mind / Added in Afterbirth 15►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 †15►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 Afterbirth15►Incubus Incubus: The Incubus will fire out bombs that, despite being visually smaller, have normal damage and explosion range.
  • 15►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.
  • 15►The Ludovico Technique The Ludovico Technique: Bomb can be controlled before exploding, similar to 15►Epic Fetus Epic Fetus. Isaac does not shoot bombs while controlling it.
  • Added in Afterbirth 15►Monstro's Lung Monstro's Lung: Shoots 6 bombs that need to be fully charged before firing. The bombs detonate simultaneously.
  • 15►Mr. Mega Mr. Mega: Adds 25 flat damage to bomb explosions.
  • Added in Afterbirth 15►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 15►The Parasite The Parasite: Upon exploding, bombs split into two other bombs, which explode almost immediately and deal a flat 24 damage.
  • Added in Repentance15►Playdough Cookie Playdough Cookie: Each bomb flashes different colors and leaves behind colorful smoke once they explode. Has a chance to have the appearance and effect of 15►Bob's Curse Bob's Curse.
  • Removed in Afterbirth Poison tears: Poison effects will give bombs a flat +50 damage. This is guaranteed by 15►Ipecac Ipecac, 15►Bob's Curse Bob's Curse, and 15►Scorpio Scorpio, and can also proc from 15►The Common Cold The Common Cold or Pinky Eye Pinky Eye.
    • Added in Afterbirth No damage increase from poison.
  • 15►Polyphemus Polyphemus: Bombs increase in size and do increased damage.
    • Added in Afterbirth Bombs become 15►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.
  • 15►Proptosis Proptosis: Doubles damage with no penalty for distance.
  • 15►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 Repentance15►Rocket in a Jar Rocket in a Jar: Shoots rocket as normal tears.
  • Added in Afterbirth15►Tech X Tech X: A laser circle forms around the bomb.
  • 15►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 15►Mr. Mega Mr. Mega effect, adding a flat 25 damage and shaking the screen.

Interactions[edit | edit source]

  • 15►Anti-Gravity Anti-Gravity: Overriden by Dr. Fetus. Tear delay decrease is still applied.
  • 15►Brimstone Brimstone: Overriden by Dr. Fetus.
    • Added in Afterbirth: Isaac continuously fires bombs while charging the blood laser. Overrides Azazel's blood laser.
  • Added in Repentance15►Brimstone Bombs Brimstone Bombs: The cross laser effect of the bombs is random.
  • 15►Chocolate Milk Chocolate Milk: Bombs can't be charged, but reduces Isaac's tear delay by 20%.
  • Removed in Afterbirth 15►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 †15►Compound Fracture Compound Fracture: No effect, but range increase is still applied.
  • 15►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 Afterbirth15►Tear Detonator Tear Detonator: No effect.
  • Guppy: Dr. Fetus Bombs exploding do not spawn flies.
  • Added in Repentance15►Immaculate Heart Immaculate Heart: Orbital tears do not become bombs.
  • Added in Afterbirth15►Kidney 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 †15►Lachryphagy Lachryphagy: Overridden by Dr. Fetus.
  • Added in Afterbirth †15►Lead Pencil Lead Pencil: Overridden by Dr. Fetus.
  • 15►A Lump of Coal A Lump of Coal: No damage increase.
  • Added in Afterbirth15►Marked Marked: Overridden by Dr. Fetus. Tear delay decrease is still applied.
    • Added in RepentanceCreates a target reticle at which the bombs continuously fire.
  • Removed in Afterbirth 15►Monstro's Lung Monstro's Lung: Same effect as 15►20/20 20/20, except retains fire rate.
    • 15►Ipecac Ipecac + 15►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.
  • 15►Mom's Eye Mom's Eye: Grants a chance to shoot an extra bomb from the back of Isaac's head.
    • 15►Mom's Eye Mom's Eye + Added in Repentance15►Eye of the Occult Eye of the Occult: Bombs that spawn from Mom's Eye will try to move to where you're shooting making it very difficult to not get hit by your own explosions.
  • 15►Mom's Knife Mom's Knife: Overrides Dr. Fetus.
    • Added in Afterbirth Isaac continuously fires bombs while charging the knife.
    • 15►Mom's Knife Mom's Knife + Added in Afterbirth15►Incubus Incubus: The Incubus loses the ability to fire out bombs.
  • 15►My Reflection My Reflection: Not recommended, as bombs lose momentum and slide back towards Isaac, making self-damage very likely.
  • Removed in Afterbirth 15►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 †15►Pop! Pop!: Overridden by Dr. Fetus.
  • Added in Afterbirth 15►Sad Bombs Sad Bombs: Fires tears as normally placed Sad Bombs would.
    • Added in Repentance The tear firing effect of the bombs is now random.
  • Added in Afterbirth15►Sticky Bombs Sticky Bombs: Bombs stick to enemies, but enemies killed by the bomb will not spawn Blue Spiders.
  • 15►Technology Technology: Overriden by Dr. Fetus.
    • Added in Afterbirth Both bombs and lasers are fired.
  • Added in Afterbirth †15►Technology Zero Technology Zero: Overridden by Dr. Fetus.
  • 15►Tiny Planet Tiny Planet: Not recommended. Bombs fly uncontrollably around the player, making self-damage very likely.
  • Added in Afterbirth †15►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)

PC Added in Repentance CXZG 2YD6 (Treasure room west to spawn)

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

PS4 Added in Afterbirth † Normal mode only LYCL LAAP (Treasure Room adjacent to spawn)

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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