When do the most important parts of the fetus form?, psychology homework help

When do the most important parts of the fetus form?, psychology homework help

Please upload your responses to the following questions:

1. When do the most important parts of the fetus form?
2. Why do substances and circumstance sometimes harm the fetus and sometimes have no impact?
3. Are newborns born with low birth-weight affected in later years?
4. Why do some mothers suffer from postpartum depression, and how does that affect the baby?

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