I have been ttc for just over 6mths now and besides charting and using FF and having regular intercourse, and also seeing an Acupuncturist/Kinesiologist (i have been the last few wks) then I can say there isnt much more you can try..... well, unless you go to a Dr and get referral to a FS to look at getting tests done on sperm analysis etc.... (we are not up to that stage yet)

Does she get much ewcm each cycle? Because some women don't get that much, they find that preseed lubricant (fertility lubricant safe for sperm) can help the swimmers get thru to where they are meant to! My DH and i use this too.... have been for about 3mths now.....

Good luck to your sister! I know how she feels hope it happens soon for her.