Effects of intravenous tranexamic acid on ovarian reserve and intra-operative blood loss during laparoscopic cystectomy of endometriotic cyst: a pilot randomized controlled trial gan Prangthip Akkaranurakkul, Srithean Lertvikool, Woradej Hongsakorn, Orawin Vallibhakara, Siriluk Tantanavipas, Krissada Paiwattananupant, Wichai Ittichaikulthol, Apirom Vongsakulyanon, Sakda Arj-Ong Vallibhakara, Makaramas Anantaburana, Areepan Sophonsritsuk