Well, assuming a gestation period of 9 months, as in humans, each trimester would be three months. Sixteen weeks is 4 months so that would be 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)
12 weeks is considered the end of the first trimester.
There is also 12 weeks in the second trimester
6 months 3 weeks 6 months 3 weeks
It is the fourth week of the third trimester.
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. :)
You cannot feel the baby move until at least 16-20 weeks in most cases, although people who have had children before may feel movements earlier than 16 weeks.
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.
3rd trimester
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.
30 weeks wich is 8 months Babies in the womb can start hearing noises from outside the womb early in the 2nd trimester. Hearing fully develops in the 3rd trimester.