What are the major features of embryonic development at the After first months of pregnancy?

Explanation

### Step-by-Step Text Solution:

1. **Understanding Pregnancy Duration**: Pregnancy typically lasts about 280 days, which is approximately 9 months and 10 days. The question focuses on the changes that occur after the first month of pregnancy.

2. **Formation of the Zygote**: The embryonic development begins with the formation of a zygote, which is created by the fusion of male and female gametes. This zygote then undergoes several divisions, leading to the formation of multiple cells.

3. **Cell Division Stages**: After the zygote is formed, it undergoes cleavage, resulting in stages of cell division known as blastomeres. The zygote divides into 2, 4, 8, and then 16 cells.

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