I came across this site for Christians struggling with infertility. Sometimes it is hard to know what the right choice is to make on these matters. They posted a few passages which I found comforting.
* That since God first created us "in His image," then the desire to procreate biological children (in our own image) is God-given. ~ Genesis 1:27-28
* That God deeply cares about the pain we face through infertility and lovingly gives us many examples of barren couples throughout the Bible so that we might know just how much our pain matters to Him. ~ Luke 8:43-48; Genesis 16:1; Genesis 25:21; Genesis 30:1; Judges 13:2-3; 1 Samuel 1:1 - 2:11; Proverbs 30:15-16; 2 Kings 4:14-17; Luke 1:5-7
This one relates to what I believe and many people keep telling me. It is all in his time.
"Notice that there was no particular sin in the life of either Zechariah or Elizabeth that was the cause of their childlessness. God kept Elizabeth childless until the proper time on His calendar."