Give me a bulleted list of the three trimesters and the corresponding weeks of pregnancy

Context: Trimesters
Pregnancy is divided into three trimesters, each lasting for approximately three months.

The first trimester begins with the start of gestational age as described above, that is, the beginning of week 1, or 0 weeks + 0 days of gestational age. It ends at week 12 or end of week 14.
The second trimester is defined as starting, between the beginning of week 13 and beginning of week 15. It ends at the end of week 27 or end of week 28.
The third trimester is defined as starting, between the beginning of week 28 or beginning of week 29. It lasts until childbirth.

Answer: - First trimester is from 0-12 weeks
- Second trimester is from 12-28 weeks
- Third trimester is from 28 weeks until birth