In addition to these specific asanas, the practice of controlled breathing relaxes muscles and calms the autonomic nervous system, reducing vascular pressure and lowering heart rate. Recommended poses and breathing exercises vary depending on individual experience and degree of symptoms. As you should have learned in your foundational yoga teacher training, most of the recommended asanas for varicose veins are inversions which are contraindicated for high blood pressure, stroke recovery, eye problems, and heart conditions.
As you practice prenatal Yoga, do remember that during your pregnancy, a hormone that helps your ligaments and bones to soften in preparation for childbirth is released, so please be mindful to not overstretch in these poses. It is highly advisable to learn prenatal Yogic techniques from a certified Yoga instructor at a professional studio.