Author Question: The frequency of twin pregnancies as determined by ultrasound examination during the first trimester ... (Read 23 times)

Coya19@aol.com · **on:** Jun 25, 2018

The frequency of twin pregnancies as determined by ultrasound examination during the first trimester of pregnancy is significantly higher than the frequency of twins delivered at term.

Indicate whether the statement is true or false

Question 2

Estrogen in oral contraceptives may lead to venous and arterial thromboses because:

A. excess estrogen in the body encourages fatty deposits in the blood vessels.
B. estrogen is a vasoconstrictor.
C. estrogen stimulates synthesis of coagulation factors.
D. estrogen promotes tissue necrosis in blood vessel walls.