What changes are observed in the uterus subsequent to implantation of young embryo?

Explanation

### Step-by-Step Solution:

1. **Fertilization and Formation of Zygote**: The process begins with fertilization, where a sperm fertilizes an egg, resulting in the formation of a zygote.

2. **Mitosis and Embryo Development**: The zygote undergoes mitosis, which is a type of cell division, leading to the formation of an embryo.

3. **Implantation in the Uterus**: Once the embryo is formed, it travels to the uterus and gets embedded in the thick lining of the uterus, known as the endometrium.

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