# birth1

> Sub-Particle System which spawns at the locations of the birth of the particles from the parent system.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

> **Warning:**
>
> **Deprecated.** birth1 property is deprecated. Use AddSubEmitter, RemoveSubEmitter, SetSubEmitterSystem and GetSubEmitterSystem instead.

```csharp
public ParticleSystem birth1 { get; set; }
```