During the
trimester, the fetus rapidly gains weight.
During the
trimester, the fetus's sex organs develop.
The umbilical cord forms during the
trimester.
The lungs do not develop until the
trimester.

During the   third   trimester, the fetus rapidly gains weight.

During the     first   trimester, the fetus’s sex organs develop.

The umbilical cord forms during the    first    trimester.

The lungs do not develop until the   third    trimester.

Explanation: it's correct on edge I just took it

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1. second

2. third

3. first

4. third

5. second

6. second

7. first

Explanation: just do it. its the answers i promise. i just took it