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Dr. Fetus

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Font TeamMeat D.pngFont TeamMeat r.pngFont TeamMeat point.png   Font TeamMeat F.pngFont TeamMeat e.pngFont TeamMeat t.pngFont TeamMeat u.pngFont TeamMeat s.png
Item icon
Item altar
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Character appearance
 
Tear appearance
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Treasure Room Treasure Room
Greed mode only Treasure Room Treasure Room
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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 timesA Fetus in a JarA Fetus in a Jar

Dr. Fetus is a Special unlockable passive item.

Effects

  • 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.

Notes

  • Dr. Fetus overrides multiple tear effect items but benefit from some (but not all) bomb-enhancing effects like Mr. Mega Mr. MegaMr. Mega Icon.pngGives Isaac 5 bombs, and makes all dropped bombs larger, which have an increased blast radius and increased damage..
    • Added in Afterbirth In Afterbirth, many more synergies have been added.
  • With Dr. Fetus, the range and shot speed stats both affect the velocity at which the bombs are fired out. Delay before explosion is not affected by either.
  • Dr. Fetus is one of the items that directly affect tear delay.

Synergies

  • Added in Afterbirth †Angelic Prism Angelic PrismAngelic Prism Icon.pngGrants a prism orbital with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.: When bombs pass through the prism, they will be quadrupled.
  • Blood Clot Blood ClotBlood Clot Icon.pngIncreases damage by 1 and range by 5 for tears fired from the left eye. / Chemical Peel Chemical PeelChemical Peel Icon.pngTears fired from left eye do increased damage.: Bonus damage has a 50% chance of happening. Blood Clot colors the affected bombs red.
  • Bobby-Bomb Bobby-BombBobby-Bomb Icon.pngGives Isaac 5 Bombs, and causes all dropped bombs to home towards the closest enemy. / Added in Afterbirth Homing Tears: Bombs home in on enemies.
  • Added in Afterbirth Cricket's Body Cricket's BodyCricket's Body Icon.pngGrants -1 Tear Delay and reduces Range. When tears hit an object or deplete their range, they spawn 4 smaller tears, whose Range and Damage scale with Isaac's.: Bombs split outwards into 4 tiny bombs, which detonate almost immediately.
  • Added in AfterbirthExplosivo ExplosivoExplosivo Icon.pngIsaac's tears have a chance to stick to enemies and explode.: Bombs fired have a chance to stick to an enemy, much like Added in AfterbirthSticky Bombs Sticky BombsSticky Bombs Icon.png+5 bombs. Bombs stick to enemies and spawn 2-4 blue spiders if they kill an enemy..
  • Fire Mind Fire MindFire Mind Icon.pngGrants flaming tears that deal burning damage over time. Tears have a chance to explode on impact with an enemy, which creates a fire at the location of the explosion.: Bombs leave behind a fire like Hot Bombs Hot BombsHot Bombs Icon.pngGrants 5 bombs. Isaac's bombs leave behind fire that damages enemies upon contact..
  • Added in Afterbirth †Haemolacria HaemolacriaHaemolacria Icon.pngTears are now fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.: 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 Afterbirth Hot Bombs Hot BombsHot Bombs Icon.pngGrants 5 bombs. Isaac's bombs leave behind fire that damages enemies upon contact.: Bombs leave behind fire that damages enemies on contact after exploding.
  • Added in AfterbirthIncubus IncubusIncubus Icon.pngA demonic familiar that follows Isaac and shoots tears identical to Isaac's in terms of damage, range, fire rate, and effects.: The Incubus will fire bombs that, despite being visually smaller, have normal damage and explosion range.
  • Ipecac IpecacIpecac Icon.pngReplaces tears with explosive and poisoning projectiles fired in an arc from the mouth.: Isaac is immune to his own bomb shots (not explosives or placed bombs) and 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. If this synergy is mixed with Sad Bomb, Isaac will remain immune to the bomb itself, but not to the explosive tears. Mixing this synergy with Monstro's Lung Monstro's LungMonstro's Lung Icon.pngIncreases damage and grants a charged shot that fires multiple tears in the same fashion as Monstro. renders Isaac no longer immune to his own shots, also they will explode as soon as you shoot.
  • The Ludovico Technique The Ludovico TechniqueThe Ludovico Technique Icon.pngInstead of firing tears, Isaac controls one floating tear that hover over obstacles. This tear deals constant damage when held in place over an enemy.: Bomb can be controlled before exploding, similar to Epic Fetus Epic FetusEpic Fetus Icon.pngIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.. Isaac does not shoot bombs while controlling it.
  • Monstro's Lung Monstro's LungMonstro's Lung Icon.pngIncreases damage and grants a charged shot that fires multiple tears in the same fashion as Monstro.: Same effect as 20/20 20/2020 20 Rebirth Icon.pngGrants double shot., except retains fire rate.
    • Added in Afterbirth Shoots 6 bombs which need to be fully charged before firing. The bombs detonate simultaneously.
  • Mr. Mega Mr. MegaMr. Mega Icon.pngGives Isaac 5 bombs, and makes all dropped bombs larger, which have an increased blast radius and increased damage.: Adds 30 flat damage to bomb explosions.
  • Added in Afterbirth Mysterious Liquid Mysterious LiquidMysterious Liquid Icon.pngTears leave a small, short lasting pool of creep on impact or when their range is depleted.: Exploding bombs leave behind a large pool of creep.
  • Removed in Afterbirth Poison Tears: Poison effects will give bombs a flat +50 damage. This is guaranteed by Ipecac IpecacIpecac Icon.pngReplaces tears with explosive and poisoning projectiles fired in an arc from the mouth., Bob's Curse Bob's CurseBob's Curse Rebirth Icon.pngGives 5 bombs and grants all bombs poison effect., and Scorpio ScorpioScorpio Icon.pngGrants poison tears, which deal damage over time when inflicted., and can also proc from The Common Cold The Common ColdThe Common Cold Icon.pngAdds a chance to shoot poison tears, dealing damage over time when inflicted. or Pinky Eye Pinky EyePinky Eye Icon.pngAdds a 10% chance to shoot a poison tear, dealing damage over time when inflicted..
    • Added in Afterbirth No damage increase from poison.
  • Polyphemus PolyphemusPolyphemus Rebirth Icon.pngMakes Isaac shoot one huge tear. Also reduces Tears to minimum. Damage increased . If tear does more damage than an enemy's life, the tear continues to travel with the extra remaining damage.: Bombs increase in size and do increased damage.
    • Added in Afterbirth Bombs become Mr. Mega Mr. MegaMr. Mega Icon.pngGives Isaac 5 bombs, and makes all dropped bombs larger, which have an increased blast radius and increased damage. bombs. After they explode, they leave behind a regular-sized bomb.
  • Proptosis ProptosisProptosis Rebirth Icon.pngTears start out massive with high damage, and then shrink down and become weaker over a short range.: Doubles damage with no penalty for distance.
  • Remote Detonator Remote DetonatorRemote Detonator Icon.pngUnlimitedBombs you place explode only when you use this item. Gives 5 bombs.: 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 XTech X Icon.pngTears are replaced with laser rings that pierce through enemies and deal damage to enemies within them. Can be charged to increase the size of the ring.: A laser circle forms around the bomb.

Interactions

  • A Lump of Coal A Lump of CoalA Lump of Coal Icon.pngThe more distance tears travel, the more damage they will do.: No damage increase.
  • Anti-Gravity Anti-GravityAnti-Gravity Icon.png-2 Tear Delay. Tears float in position until firing ceases, after which they will fly off in the direction they were shot in.: Tears up, but no anti-gravity effect.
  • Brimstone BrimstoneBrimstone Rebirth Icon.pngTears 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.: Overrides Brimstone.
    • Added in Afterbirth: Isaac continuously fires bombs while charging the blood laser. Overrides Azazel's blood laser.
  • Chocolate Milk Chocolate MilkChocolate Milk Icon.pngGrants charged tears that deal greater damage when fully charged.: Slightly increases fire rate; no effect on damage.
  • Cricket's Body Cricket's BodyCricket's Body Icon.pngGrants -1 Tear Delay and reduces Range. When tears hit an object or deplete their range, they spawn 4 smaller tears, whose Range and Damage scale with Isaac's.: Slight tears up and greatly reduced range, but bombs do not split.
    • Added in Afterbirth: Upon exploding, bombs split into four small bombs that are not affected by Isaac's bomb modifiers.
  • Added in Afterbirth †Compound Fracture Compound FractureCompound Fracture Icon.pngIncreases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle.: No effect beyond slight range increase, bombs do not split.
  • Epic Fetus Epic FetusEpic Fetus Icon.pngIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.: Overrides Dr. Fetus.
  • Added in Afterbirth † The Forgotten: A live bomb will spawn on top of The Forgotten when he start 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. The melee is unaffected.
  • Guppy: Dr. Fetus Bombs exploding do not spawn flies.
  • Added in AfterbirthKidney Stone Kidney StoneKidney Stone Icon.pngRandomly while firing tears, Isaac will stop firing and turn red, where he will charge and release a lot of 'tears' in one go. In the burst of tears is a kidney stone which deals a lot of damage.: Not recommended. Due to Kidney Stone's massive range decrease, and due to the tear height stat not affecting Dr. Fetus' bombs, they spawn directly in front of Isaac, making self damage very likely.
  • Added in Afterbirth †Lachryphagy LachryphagyLachryphagy Icon.pngIsaac's tears decelerate as they travel. Upon stopping or hitting an obstacle, they burst into 8 tears in all directions. Tears can be fired into other tears to feed them, increasing their damage.: Overridden by Dr. Fetus.
  • Added in Afterbirth †Lead Pencil Lead PencilLead Pencil Icon.pngAfter every 15 tears fired, Isaac will fire a high-damage cluster of tears.: Overridden by Dr. Fetus.
  • Added in AfterbirthMarked MarkedMarked Icon.pngIsaac will now fire tears automatically directed at a red target on the ground which is controlled by the player. This allows for a full 360 degree tear firing radius. Can be overridden by other tear modifiers such as Mom's Knife or Brimstone.: Overridden by Dr. Fetus except for stat effects which are applied.
  • Mom's Eye Mom's EyeMom's Eye Rebirth Icon.pngAllows Isaac to fire tears from the back of his head.: Grants a chance to shoot an extra bomb from the back of Isaac's head.
  • Mom's Knife Mom's KnifeMom's Knife Rebirth Icon.pngIsaac's tears are replaced by a knife that pierces enemies, can travel through obstacles, and can hurt enemies while Isaac is holding it. Holding down the fire button before firing increases its range and power.: Overrides Dr. Fetus.
    • Added in Afterbirth: Isaac continuously fires bombs while charging the knife.
    • Mom's Knife + Added in AfterbirthIncubus IncubusIncubus Icon.pngA demonic familiar that follows Isaac and shoots tears identical to Isaac's in terms of damage, range, fire rate, and effects.: The Incubus loses the ability to fire bombs.
  • My Reflection My ReflectionMy Reflection Icon.pngGives Isaac's tears a boomerang effect, and increases range and shot speed.: Bombs lose momentum and slide back towards Isaac.
  • The Parasite The ParasiteThe Parasite Icon.pngIsaac's tears split in two when they hit something.: No effect.
    • Added in Afterbirth Bombs split into two bombs upon exploding.
  • Added in Afterbirth †Pop! Pop!Pop! Icon.pngReplaces Isaac's tears with eyeballs that can bounce off of each other. The eyeballs are not limited by range, and will instead dissipate when they stop moving or when hitting an enemy or obstacle.: Overridden by Dr. Fetus.
  • Added in Afterbirth Sad Bombs Sad BombsSad Bombs Rebirth Icon.png+5 Bombs. Upon exploding, bombs shoot 8 tears off in every direction, similar to Tammy's Head. The tears are affected by any tear modifiers Isaac has on his own tears.: Fires tears as normally placed Sad Bombs would.
  • Technology TechnologyTechnology Icon.pngReplaces tears with a piercing laser with unlimited range.: Overrides Technology.
    • Added in Afterbirth Both bombs and lasers are fired.
  • Added in Afterbirth †Technology Zero Technology ZeroTechnology Zero Icon.pngConnects Isaac's tears with electricity that can damage enemies.: Overridden by Dr. Fetus.
  • Tiny Planet Tiny PlanetTiny Planet Icon.pngRange up and makes shot tears revolve around Isaac until they drop.: Bombs fly uncontrollably around the player. This is very dangerous and not recommended.
  • Tough Love Tough LoveTough Love Rebirth Icon.pngAdds a chance to shoot a tooth instead of a tear, which deals greater damage than regular tears.: Applies damage and radius bonus, however bomb appearance remains unchanged.
    • Added in Afterbirth Tears that would have fired a tooth shot instead become a bomb with the Mr. Mega Mr. MegaMr. Mega Icon.pngGives Isaac 5 bombs, and makes all dropped bombs larger, which have an increased blast radius and increased damage. effect, dealing more damage and shaking the screen.
  • Added in Afterbirth †Trisagion TrisagionTrisagion Icon.pngTears are replaced with piercing white blasts of light.: Overridden by Dr. Fetus.

In-game Footage

Gallery

Trivia

  • The Dr. Fetus and Epic Fetus items are based off of 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 Challenge #9 (Demo Man).
  • In the original Binding of Isaac, Dr. Fetus was unlocked by beating Mom's Heart five times instead of nine.

Bugs

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 causes black hearts to drop.

Seeds

 PC  KP6M WZAJ (treasure room adjacent to spawn) (normal and hard mode)

 PC  9LCJ RQG8 (treasure room adjacent to spawn) (normal mode only)


Mom's Heart  Unlocks Mom's Heart Unlocks Mom's Heart  Unlocks
A NooseA NooseDefeat Mom's Heart 3 timesA QuarterA QuarterDefeat Mom's Heart 8 timesA Fetus in a JarA Fetus in a JarDefeat Mom's Heart 9 times??????Defeat Mom's Heart 10 timesEverything Is Terrible!!!Everything Is Terrible!!!Defeat Mom's Heart 5 timesIt Lives!It Lives!Defeat Mom's Heart 11 timesWire Coat HangerWire Coat HangerDefeat Mom's Heart 4 timesIpecacIpecacDefeat Mom's Heart 6 timesExperimental TreatmentExperimental TreatmentDefeat Mom's Heart 7 timesRubber CementRubber CementDefeat Mom's Heart 2 timesDarkness FallsDarkness FallsDefeat Mom's Heart 11 timesSolar SystemSolar SystemDefeat Mom's Heart 3 timesSuicide KingSuicide KingDefeat Mom's Heart 11 timesDemo ManDemo ManDefeat Mom's Heart 9 timesLost BabyLost BabyDefeat Mom's Heart on hard mode as IsaacCute BabyCute BabyDefeat Mom's Heart on hard mode as MagdaleneCrow BabyCrow BabyDefeat Mom's Heart on hard mode as EveShadow BabyShadow BabyDefeat Mom's Heart on hard mode as JudasGlass BabyGlass BabyDefeat Mom's Heart on hard mode as CainWrapped BabyWrapped BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Added in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Begotten BabyBegotten BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Added in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Dead BabyDead BabyDefeat Mom's Heart on hard mode as ???-0- Baby-0- BabyDefeat Mom's Heart on hard mode as The LostGlitch BabyGlitch BabyDefeat Mom's Heart on hard mode as EdenFighting BabyFighting BabyDefeat Mom's Heart on hard mode as Samson
Goat Head BabyGoat Head BabyDefeat Mom's Heart on hard mode as LilithBlue WombBlue WombDefeat Mom's Heart 10 timesSuper Greed BabySuper Greed BabyDefeat Mom's Heart on hard mode as KeeperBlue BomberBlue BomberDestroy 10 tinted rocks and defeat Mom's Heart 11 times Pokey MansPokey MansDefeat Mom's Heart 11 timesSmelterSmelterDefeat Mom's Heart or It Lives! on hard mode as ApollyonBurning BasementBurning BasementDefeat Mom's Heart 11 timesMarrowMarrowDefeat Mom's Heart or It Lives! on hard mode as The Forgotten
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