One of my favorite verses is "Delight yourself in the Lord, and He will give you the desires of the heart." found in Psalm 37:4. It's so fitting for this situation. I often hear women in this situation ask "Why would God put a desire in my heart to have a child, and then not allow me to have one?" I also want to ask this question, but I won't; I don't think it's my place to know why. We are little tiny beings who can't even begin to fathom what God is thinking or what His intentions are. Even if He told me why, I wouldn't get it.
I absolutely know that God does everything for a reason and that reason is to glorify God. With that said, I believe God did put a desire for children in my heart for a reason in order to glorify Him. I also know that God is so amazing that every minor or unnoticed detail is a perfectly planned detail in the big picture which will be fulfilled. With that said, God didn't just throw some random desire my way just because and then not have a plan to fulfill it. So to answer the "Why give me the desire and not fulfill it" question, I say that I KNOW God put this desire in me for a reason and I know God WILL fulfill it. I don't know when and I don't know how, but I am confident it will be done.
I also believe that we as humans, probably don't know our own desires as well as God knows them. I mean God knows how many hairs are in my head and I only know that I have a lot of them and they're all "blonde". If God knows that minor detail better than me, what makes me think I know such major details like my desires better than God knows them? Good question...I don't. God can see straight through my heart. So I feel the desire is there for me to have my own baby right now, but God knows my true desire. Why would I put God in a little box and ask Him to fulfill my immediate desire, when He is so much bigger than that and so capable of fulfilling His true desire He gave me that will also fulfill His plan which will glorify Him? I'd much prefer the latter.
I try to think about it as I did my dating life. I remember being in high-school and college being the drama queen I try to avoid. Crying after many break-ups, I would say the infamous lines every girl says at least once in her life, "I'm never going to get married" or "I'm never going to meet anybody." But, as it turns out, I did meet someone, and he is more perfect than anyone I could have picked out for myself. I love so many things about him, but his aspect that I love the most is just the feeling he gives me when I'm with him. I met him a month before I graduated college and moved back home. At the time I thought that was a horrible time to meet, but it was actually ideal because we were both able to experience so much that when we did meet, it was an obvious match. So I try to remember this when trying to have a baby. I can't have one now and maybe I'll never be able to, but when my true desire for a child is fulfilled, no matter how God fulfills it, he (or she or they) will be so much more perfect than I could have imagined and the timing couldn't be better.
