Dr. Fetus

Dr. Fetus is a Special unlockable passive item.

Effects

 * Tears are replaced with bombs that explode approximately one second after being fired.
 * Each bomb deals 3 times the character's normal tear damage.
 * 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.

Synergies

 * //: Fires multiple bombs at the same time.
 * : When bombs pass through the prism, they will be quadrupled.
 * : Bonus damage applies on every shot. Also turns bombs red.
 * : Creep is left along the path that the bomb travels.
 * : Bombs slowly home in on enemies.
 * : Bombs explode in a large cross pattern.
 * : Bombs confuse enemies, and deal minor damage to the entire room, regardless of impact.
 * : Slightly increases fire rate; no effect on damage.
 * : Bombs split outwards into 4 tiny bombs, which detonate almost immediately.
 * : Bombs leave behind a fire like.
 * : The random tear effects are instead applied on bomb explosion. Some of the normal effects are replaced with bomb-specific effects, like.
 * : Each bomb fired has a chance of dropping a random consumable or trinket (rarer) after exploding. This synergy theoretically gives you an infinite supply of consumables.
 * : Significantly increased tear delay. Isaac fires a large arcing tear reminiscent of a bomb that scatters into 3-5 bombs that explode simultaneously.
 * : No effect.
 * : The item grants invincibility from explosions, preventing self-damage.
 * : Bombs leave behind fire that damages enemies on contact after exploding.
 * Homing Tears: Bombs home in on enemies.
 * : Shoots 3 bombs instead of 1, but decreases fire rate.
 * : 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 renders Isaac no longer immune to his own shots, also they will explode as soon as you shoot.
 * : Bomb can be controlled before exploding, similar to.
 * : Same effect as, except retains fire rate.
 * Shoots 6 bombs which need to be fully charged before firing. The bombs detonate simultaneously.
 * : Adds 30 flat damage to bomb explosions.
 * : Shoots 4 bombs instead of 1, but decreases fire rate
 * Poison Tears: Poison effects will give bombs a flat +50 damage. This is guaranteed by, , and , and can also proc from or.
 * No damage increase from poison.
 * : Each bomb fired has a small chance to home in on enemies.
 * : Bombs will become spectral and pass through objects just like spectral tears do.
 * : Bombs increase in size and do increased damage.
 * Bombs become bombs. After they explode, they leave behind a regular-sized bomb.
 * : Doubles damage with no penalty for distance.
 * : Bomb explosions heal Isaac, granting infinite health as long as Isaac has more than one heart container.
 * : Bombs can be detonated early, making it easier to hit moving enemies.
 * : Fires tears as normally placed Sad Bombs would. If this synergy is combined with Ipecac, the tears from the bomb become explosive, which Isaac is not immune to. Note: tears fired from previous Dr. Fetus bombs can collide with other Dr. Fetus bombs (can be negated with spectral tears).
 * : Each bomb splits into 2-4 small bombs, each of which is also affected by Isaac's bomb modifiers.
 * : Causes your bombs to randomly be transformed into poison bombs.
 * : The bombs are purple and act as if Isaac had.
 * : A laser circle forms around the bomb and kills occasionally drop black hearts.
 * : Shoots two bombs diagonally.

Interactions

 * : No damage increase.
 * : Tears up, but no anti-gravity effect.
 * : Overrides Brimstone.
 * : Isaac continuously fires bombs while charging the blood laser. Overrides Azazel's blood laser.
 * : Slight tears up and greatly reduced range, but bombs do not split.
 * : Upon exploding, bombs split into four small bombs that are not affected by Isaac's bomb modifiers.
 * : No effect beyond slight range increase, bombs do not split.
 * : Grants a chance for bombs to inflict Fear on enemies
 * : Tear size and shape don't apply, but all other effects apply.
 * : Overrides Dr. Fetus.
 * : Bombs fired have a chance to stick to an enemy, much like.
 * The Forgotten: The charge attack is replaced by a live bomb in the Forgotten's hand. It is thrown on release, but may also explode in his hand if it's held too long. The range of the throw doesn't depend on length of charge, unless the bomb explodes mid-air. The melee attack is unaffected.
 * Guppy: Dr. Fetus Bombs exploding do not spawn flies.
 * Keeper: Decreases Keepers tear rate but he shoots 3 bombs.
 * Keeper + Decreases Keepers tear rate even further but he shoots 6 bombs.
 * : 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.
 * : Overridden by Dr. Fetus.
 * : Overridden by Dr. Fetus.
 * : Grants a chance to fire four bombs in the cardinal directions.
 * : Overridden by Dr. Fetus except for stat effects which are applied.
 * : Grants a chance to shoot an extra bomb from the back of Isaac's head.
 * : Overrides the bomb.
 * : Isaac continuously fires bombs while charging the knife.
 * : Bombs lose momentum and slide back towards Isaac.
 * : Exploding bombs leave behind a large pool of creep.
 * : Reduces range, increases tear rate, and tints bombs yellow.
 * : No effect.
 * Bombs split into two bombs upon exploding.
 * Piercing Tears: Bombs travel through enemies.
 * : Overridden by Dr. Fetus.
 * : No effect.
 * : Rapidly fires low-damage bombs.
 * : Shoots 10 bombs in a circle around Isaac.
 * : Overrides Technology.
 * Both bombs and lasers are fired.
 * : Both laser and bombs are fired. If playing as Cain, the ability to fire bombs is removed, leaving only the laser.
 * : Overridden by Dr. Fetus.
 * : Bombs fly uncontrollably around the player. This is very dangerous and not recommended.
 * : Applies damage and radius bonus, however bomb appearance remains unchanged.
 * Tears that would have fired a tooth shot instead become a bomb with the effect, dealing more damage and shaking the screen.
 * : Overridden by Dr. Fetus.

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).

Seeds
KP6M WZAJ (treasure room adjacent to spawn) (normal and hard mode) 9LCJ RQG8 (treasure room adjacent to spawn) (normal mode only)