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Birth Control item
Birth Control is a passive item in Revelations, a mod for The Binding of Isaac.
Description
Converts all of Isaac's familiars (both newly or previously acquired) into +0.2 flat damage.
Some familiars have special effects when absorbed, such as granting items that have similar effects to the familiars.
Fly-themed familiars spawn 2-6 Blue Flies when absorbed.
Spider-themed familiars spawn 2-5 Blue Spiders when absorbed.
Isaac's tears can inherit the tear color of absorbed familiars' tears, however he won't absorb the tear effects associated with it.
By default, all items of type familiar are absorbed and converted to damage, except:
• 1up!
• Isaac's Heart
• Dead Cat
• Key Piece 1
• Key Piece 2
• Knife Piece 1
• Knife Piece 2
• Spider Mod
• Halo of Flies
• Lil Belial
• Mirror Shard
• Mirror Fragment
Item pools
Birth Control can be found in the following item pools:
| Name | Weight |
|---|---|
| Secret Room |
1.0/1.0
|
| Greed Secret Room |
1.0/1.0
|
| Mom's Chest |
0.5/1.0
|
| Old Chest |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| offensive | Can appear for  Tainted Lost. |
Special synergies
The following special synergies and interactions for Birth Control have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Baby-Bender | Grants Isaac homing tears. |
| --- | Child Leash | Sets Isaac's speed to 1. |
| --- | Duct Tape | Prevents Isaac from sliding, making him stop immediately when the movement keys are released. |
| --- | Extension Cord | Isaac will shoot a laser to the nearest enemy once every 1-4 seconds that deals Isaac's amount of damage. |
* Note that not all possible synergies and interactions are listed here.
External links
- Check out the item description on the mod's external Wiki.
- Download Revelations from the Steam Workshop.
Cotton Bud 
Sponge Bombs 
Spirit of Patience 
Friendly Fire 
Tummy Bug 
Wandering Soul