Astanga Hrudaya
अपानोऽपानगः श्रोणिबस्तिमेढ्रोरुगोचरः। शुक्रार्तवशकृन्मूत्रगर्भनिष्क्रमणक्रियः॥९॥
Apana Vata –Apana Vata is located in the Apana – large intestine, moves in the waist, bladder, genitals. It attends to the functions such as ejaculation, menstruation, defecation, urination and child birth.
english translation