My grandmother seemed to have a knack of knowing when a family member was pregnant ... she would dream of fish!!! Whenever grandma had a dream about fish we would take bets as to who would end up finding out they were pregnant. I would not put all my hopes into it -- I am a very guarded person though I have been let down too many times, but I hope it works out for you :)

This is strange but I have had more than a few times that I have looked at someone and known they were pregnant - a couple of times before the person even knew! It started in 7th grade - my music teacher was conducting the orchestra - I actually stopped playing and looked at her - smiled - and continued playing - 2 months later she told us! - I also knew ahead of time with my husbands side of the family - 3 times! Don't know what I am picking up on but I just knew. 2 of them didn't know they were pregnant yet and 1 of them I knew she would be pregnant within 6 months even though her and her husband had decided to wait a year before trying. There have been several other people (mostly at work) that I knew before they told anyone. I have been pregnant twice and knew that second I would end up pregnant. The first time I freaked out but the second I looked at my husband and said "Merry Christmas Daddy" and now we have a beatiful 8 year old daughter! I think some people have some super sensitive sense and they can pick up on very subtle things that in general we don't pick up. As far as predicting pregnancy not sure how I feel about that one.
I know another thing that might happen is that by this grandmother sensing pregnancy soon it gives the women a more optimistic approach, and a positive mind goes a lot further than people think! So just keep thinking that it MIGHT happen and maybe it will! I wish you all the best.