three months
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.
A typical pregnancy is divided into three trimesters. The first trimester lasts from week 1 to week 12, the second trimester spans from week 13 to week 26, and the third trimester runs from week 27 to the end of the pregnancy at around week 40. Therefore, each trimester contains approximately 13 weeks, though the exact number can vary slightly depending on the specific timing of the pregnancy.
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.
The first trimester is 0-12 weeks of pregnancy, roughly 3 months
The third trimester starts at week 28, or 7 months into the pregnancy.
2nd trimester
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As long as it's not outdated!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.