1st trimester- all of the baby's body structures and systems develop
2nd trimester- marked by the grown and masturbation of the fetus's organs and body systems.
3rd trimester- the fetal systems continue to grow and mature also the time of the greatest weight gain
Brain development, lung maturation and overall growth are the main changes in the last trimester.
second trimester
The third trimester starts at week 28, or 7 months into the pregnancy.
The first trimester is 0-12 weeks of pregnancy, roughly 3 months
2nd trimester
3rd trimester
The role of DHA in fast trimester in pregnancy is that it is used in neurological and visual development.
The last trimester of pregnancy is sometimes referred to as advanced pregnancy.
second trimester
The third trimester begins at 29 weeks of pregnancy
A trimester contains the prefix 'tri' as in triangle - and it means 3 or a third. The first trimester of a pregnancy therefore means the first third of the pregnancy and as a pregnancy is 9 months long, it refers to the first 3 months.
There is also 12 weeks in the second trimester