* fainting (due to reduced cardiac output and a drop in blood pressure, lowering the upper body produces a reflex that restores normal circulation)<ref>[http://www.babycenter.com/0_varicose-veins-during-pregnancy_271.bc BabyCenter.com: Varicose Veins During Pregnancy]</ref> | * fainting (due to reduced cardiac output and a drop in blood pressure, lowering the upper body produces a reflex that restores normal circulation)<ref>[http://www.babycenter.com/0_varicose-veins-during-pregnancy_271.bc BabyCenter.com: Varicose Veins During Pregnancy]</ref> |