(Yoni Mudrā): “The seal of the womb,” a meditation hand gesture in which the hands are placed together, creating the shape of a yoni with the fingers and thumbs. In Tantra Yoga and Hatha Yoga practices aimed at the awakening of kundalini shakti, yoni mudra is the name of a technique practiced by both men and women that involves the contraction of the sexual muscles. It is seen as one of the most useful practices for controlling ejaculation.