I hear omega 3 fatty acid can help. Also something called Evening Primrose oil. And of course, dont forget about Folic acid, as it has been shown to help prevent certain birth defects when taken before and during pregnancy. I heard that the omega 3 fatty acid increases blood flow to the uterus. And that the Evening Primrose oil helps to produce healthy cervical mucus. But Primrose oil should only be taken from the 1st day of your period till ovulation. It shouldnt be taken during pregnancy or after ovulation because conception may have occured. I believe the reason for not taking it during pregnancy is it can cause early contractions, which obviously would not be good. I dont know personally if they really do help. Maybe try looking thoses two up on google and see what you come up with. Hope this helps....