Which of the following is the least likely physiological change in pregnancy :
Increase in intravascular volume
Increase in cardiac output
Increase in stroke volume
Increase In peripheral vascular resistance
The increase in cardiac output does not cause increase in BP. This is due to massive fall in peripheral vascular resistance due to smooth muscle relaxant propeies of progesterone. Reference : Dutta's Textbook of Obstetrics 7th edition page 53
General obstetrics