and, alta charo, a professor of law and bio-ethics at the university of wisconsin madison.a charo, i wonder if we're moving now from choices based on health concerns to choices based on having greater options. >> in a sense, yes, we are. egg freezing was important for women who had to undergo a medical preening such as chemotherapy and who wanted to at least preserve the possibility of having children genetically of their own some time in the future. but the prospect of women beginning to do this in order to simply preserve their fertility while they advance their careers is a new phenomenon and somewhat more troubling because it is simply not as successful as having children through ordinary conception or even true ordinary in vitro fertilization and freezing your embryos. >> ifill: sara's kosher pizza, -- sarah elizabeth richard, you've written a book about this, "motherhood rescheduled: the new frontier of egg freezing and the women who tried it". what are the options for women here? >> it's great that companies are covering it and makes the option available for women wh