13 weeks and 3 days are 1 trimester for school
There are two semesters in one year, so four semesters would be two years. But since school years start in one year and end in the next, four semesters would take two years starting halfway through one and ending halfway through another. I'll give an example: Semester 1- second half of 2009. Semester 2- first half of 2010. Semester 3- second half of 2010. Semester 4- first half of 2011. So, four semesters can be in three years, 2009, 2010, and 2011, but it only takes half of 2009 and 2011.
according to statistics, about 13 weeks.
There is also 12 weeks in the second trimester
First trimester: 0-12 weeks (so 12 total) Second trimester: 13-28 weeks (so 15 weeks total) Third trimester: 29 weeks-40 weeks (so 11 weeks total)
13 weeks and 3 days are 1 trimester for school
just to let you know the first trimester starts from 0-13 weeks and the second trimester is from 14 weeks to the 28th weeks and the 3 trimester from 29 weeks to 40 weeks or whenever you deliver they are not all equal the 2nd trimester is the most difficult and the longest with the last trimester actually being your shortest. Good luck with your pregnacy. :)
12 weeks is considered the end of the first trimester.
Roughly 1 to 12 weeks.
6 months 3 weeks 6 months 3 weeks
It is the fourth week of the third trimester.
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.
3rd trimester
17 weeks is 4 months - one month into the second trimester.
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.