What is the specific name for first milk during early lactation and what is its function in newborn human baby?

Explanation

### Step-by-Step Solution:

1. **Identify the First Milk**: The first milk produced during early lactation is specifically called **colostrum**.

2. **Composition of Colostrum**: Colostrum is characterized as a **thick, yellowish-white fluid**. It is rich in proteins and contains various micronutrients, including carbohydrates and fats.

3. **Importance of Colostrum**: The primary function of colostrum in a newborn's body is to provide essential nutrients and immune protection. It contains **various useful proteins and antibodies**, particularly **IgA** (Immunoglobulin A), which is a secretory antibody.

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