Answer:
A pregnancy trimester lasts about three months.
Explanation:
The normal duration of a pregnancy is 40 weeks, which could usually be between 37 and 42 weeks. This duration allows the complete development of the fetus.
The pregnancy is divided into three trimesters of 3 months each (or approximately 12 to 14 weeks).
The first trimester starts counting from the moment of conception until the 13th week of pregnancy. Here there is a great hormonal change. The placenta and the fetus begin to form and the baby's organs will begin to form at the end of the trimester.
The second trimester runs between weeks 13 and 27. A growth in the size of the uterus can be noticed and the baby's movements can begin to be felt. Also at this stage the baby is already more developed, he can begin to suck his thumb and hair is forming.
The third trimester goes from week 28 until birth, which will be in week 40 if the pregnancy is complete. Here the baby will already open his eyes and his weight will increase a lot.
