Like Sarah and Rivka, the previous two generations of matriarchs, Rachel also appears unable to have children. While her sister Leah has a brood, Rachel bemoans her fate and demands Yaakov grant her children. Her husband replies harshly that he was not the one at fault or had denied her children. But was there a reason for Rachel's condition? If we examine the timeline, a potential answer quickly emerges. One that could have been apparent, but was not at the time. Yaakov makes an agreement with Lavan, the father of both Rachel and Leah, to work 7 years for Rachel's hand in marriage. Lavan famously cheats Yaakov and substitutes her sister instead. He then offers to let Yaakov also marry Rachel after eight days if he works for another 7 years. During these 7 years, Leah has seven children. It's an impressive record. During this same period, Rachel is unable to have children.  Finally, when Yosef is born, Yaakov tells Lavan, "And it came to pass, when Rachel had borne Jos...

 Parshat Toldos begins with Yitzchak and Rivka, seemingly doomed to replay the tragedy of Avraham and Sarah by being unable to have children. The third pasuk tells us that "Yitzchak entreated G-d for his wife, for she was barren, and G-d accepted his prayer."  While the pasuk makes no mention of Rivka praying, commentaries interpret Le'Nochach, a word in the pasuk, as meaning opposite, suggesting that they were both praying. Rashi comments that G-d accepted Yitzchak's prayer, not Rivka's, because he was the son of a tzaddik and she was the daughter of a wicked man. There are however obvious questions to be raised about this, not least of which is that it would imply that Yitzchak's prayers would be more effective than that of his own father's.  There are a number of other answers as to why G-d might have listened to Yitzchak's prayer, rather than Rivka's. From a halachic perspective, men, not women, are obligated in the biblical command to have chi...