In which trimester is a woman who is 4 months pregnant?

A woman who is 4 months pregnant is in the second trimester. Pregnancy is typically divided into three trimesters, with each trimester lasting approximately three months. The first trimester encompasses the first 12 weeks of pregnancy, while the second trimester spans from week 13 to week 26. Since 4 months equates to approximately 16 weeks, this places a pregnant woman securely in the second trimester, making this the correct choice. This period is characterized by significant fetal growth and development, as well as changes in the mother’s body as she adjusts to her pregnancy.