<prompt> Regarding hemodynamic changes in pregnancy, all of the following are true except :-Hemodynamic changes sta taking place after 12 weeks of gestationVenocaval compression begins at about 16 weeks of gestationThere is midtrimester fall in blood pressureSystolic murmur may occur normally  <response>: Cardiac Output : Stas increasing by as early as 5th week increases by 30 6litresMin reaches to peak at 32nd -34th week antenatally Even higher during labour and its maximum immediate post paum Hea Sounds in Pregnancy: - Exaggerated splitting of the first hea sound and increased loudness of both components A loud easily heard third sound 95 develop systolic murmur which disappears after delivery. 20 have a transient diastolic murmur. 10 develop continuous murmur due to increase mammary blood flow. Systemic Pressure changes; Early or mid pregnancy fall in BP late pregnancy rise in BP Hea rate increases 10-20. Stroke volume increases 10. Mean aerial blood pressure decreases 10. Peripheral resistance decreases 35 