After a lap and dye: hysteroscopy, laproscopy and ovarian diathermy in October I have had two very long cycles (37 days and 40 days). I had heard that very long cycles could be problematic for conception. Any advice or thoughts? I had a mmc in Oct 06 and then diagnosed with PCOS and put on clomid. When that didn't work I had the surgery which found no problems other than minor PCOS. I'm worried that my long cycles are potentially problematic.