The correct answer is that Bedrest keeps the strain of the fetus off the cervix, minimizing cervical dilation; the aspect-lying role enhances uterine perfusion. raising the foot of the mattress on blocks will impede breathing and isn't counseled. Sitting will growth stress at the cervix. Assuming the knee-chest role numerous instances an afternoon for a few minutes might also help relieve the pressure of the fetus on the cervix, but it's going to now not beautify uterine perfusion and isn't encouraged.