medical science

"Why Was Rebecca Barren?"

In parashat Toledot, Isaac and Rebecca both pray that Rebecca will be blessed with a child. After many years of barrenness, G-d listens to the prayer and Rebecca conceives. Why was Rebecca barren, and why were the other matriarchs--Sara and Rachel--also barren? Our rabbis offer up a host of answers. Those answers notwithstanding, we need to be more sensitive in our relations to those couples who pray for children and are not given a positive response.