When a woman is 4 months pregnant, she is considered to be in the second trimester. A typical pregnancy lasts 9 months with each trimester 3 months long.
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.
Pregnancy lasts about 40 weeks and is divided into 3 trimesters, which are about 12-14 weeks long each. The first trimester ends around week 13, the second ends around week 26, and the third trimester ends anywhere between week 38 and 42, depending on when the baby is born.
There are three trimester in pregnancy. Each trimester is three months. Each trimester indicates specific fetal development. Based on trimester physician can compare the growth of the fetus and see if there any abnormalities and also decide which medication to use.
2nd 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
Yes, each woman and pregnancy is unique. It is possible to leak colostrum during the first trimester. That is how I knew I was pregnant with my third child.
As long as it's not outdated!
3rd trimester
You should have minimum three screenings through out pregnancy. One in each trimester. Additional screenings are done as and when indicated.
The role of DHA in fast trimester in pregnancy is that it is used in neurological and visual development.