“…[13][14][15][16][17][18][19] Moreover, some investigators reported that stress reduction by relaxation training, hypnosis during embryo transfer (ET) and medical clowning after ET improved outcome, 6,[20][21][22][23] but other studies showed that stress reduction therapy did not help to improve pregnancy rate. [24][25][26][27] The controversial findings relating to stress and clinical outcome following IVF treatment may be due to a number of reasons. First, it has been shown that stress level fluctuated during IVF treatment, [7][8][9][10]28 with several studies reporting higher stress during pregnancy testing.…”