What is the normal of fibrinogen in the three trimesters?

Fibrinogen levels typically increase throughout pregnancy. In the first trimester, normal fibrinogen levels range from about 200 to 400 mg/dL. During the second trimester, levels rise to approximately 300 to 500 mg/dL, and in the third trimester, they can reach 400 to 600 mg/dL or higher. This increase is part of the body's preparation for potential bleeding during childbirth.