God's will?

Recently, Bill asked a question on facebook about choosing the sex of a baby...do you think it is wrong? The post drew a lot of responses and a bunch of them had to do with God's will. So...my little brain started ticking. God's will is tricky, do we really know what it is or are we just trying to impose ours? I know there are times when there is a "burning bush" in front of us and then we can be sure but other times God's will is confusing. There was a lot of talk about "playing God" and how you shouldn't do it but, are you really looking at it from all angles? What about things like "the pill?" Why is it okay to prevent having babies? Is that not playing God? You are choosing to keep from having a baby that you don't want to have. If it is God's will that is what you are concerned about then why not trust Him after all, He won't give you anything you can't handle...Right? How about terminal illness? What about cancer? You all know that this is a disease that has hit home with me. God willed Mandy to have cancer. She trusted Him, went to doctors who tried to help her. She used modern technology to try to prolong and possibly save her life. Was she "playing God" because she didn't let nature take it's course. Before considering it wrong look at the big picture, put yourself in the other persons shoes. I don't think it is wrong to increase your odds, people do it everyday. I know this is my opinion and I would never push it on anyone. I am talking as a mom of 4 healthy boys, who I love and am thankful for, but I would be lying if I told you I don't have a yearning for a little girl. My boys were given to me by God and I wouldn't want it any other way. I am sure there are thousands of people who have always dreamed of a little girl (or boy) and if modern technology can help them fulfil a dream, why not take advantage of it if that is their prerogative?