Selvaratnam, 42, has now poured her considerable energy into a book detailing her experience with infertility, called The Big Lie: Motherhood, Feminism, and the Reality of the Biological Clock. It’s a bold title. It may bother you. It may even seem disingenuous: After all, only 10 to 20 percent of women over 35 will be unable to get pregnant after six months of trying to conceive. But Selvaratnam’s intention is to provoke.