I have been ttc for 5 1/2 years with no success! My cycles have been 21 days and I ovulate on about cd 12-14 so my luteal phase is very short! So even if I did conceive the baby wouldn't stick! I started taking vitamin b6 this month and even though I'm not pregnant as we missed ov, my cycle was 26 days! I'm so happy that it makes me excited for next month as  I will make sure we don't miss ov! I really think the vitamin b6 has helped give me the extra days I need!