---
title: birth1
product: Unity Editor
version: '7000.0'
latest_version: '7000.0'
status: This page documents version 7000.0. The latest version is 7000.0.
canonical: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/particlesystem/subemittersmodule/birth1
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/particlesystem/subemittersmodule/birth1.md
last_updated: 2026-10-07
generated_at: 2026-11-11T21:34:23.265Z
locale: en-us
---

# 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/7000.0/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; }
```