Sarai was barren; she had no child.  Gen. 11:30

Sarai is the first mention of a barren woman in scripture.  We know she ultimately has a child, but until that time she was barren. The curious thing about this condition is that it prevents a woman from completely enduring the curse that God proclaimed back in the garden on Eve. (Gen. 3:16)  At the same time, not all women have children or even attempt to.  So it would seem they avoid this part of the curse by their choices.  Any truly barren woman however need not take such pains to avoid it.