Cramp in your leg   A leg is cramped frequently at the later stage of pregnancy due to the weight of the enlarged uterus. A cramp in a leg may be relieved by stretching the cramped leg as much as possible while holding the back support of a chair with two hands when standing about 15 cm away from the chair and fixing the heel of the cramped leg to the ground. If a leg is cramped when you lie down, have a person press your knee with one hand and lift your heel with another hand while the surface of the sole of a foot is perpendicular to the foot.