Teens Taught Fertility 101

A new book teaches teenage girls how to determine when they are (and are not) most likely to become pregnant, but some adults are sure they want girls to have the information. Cycle Savvy,The Smart Teen's Guide to the Mysteries of Her Body by Toni Weschler, shows teens how to chart fertility over their monthly cycles. 

Critics charge that the knowledge can lead to irresponsible behavior (read: unprotected sex). Anticipating objections, Weschler and her co-author omitted details on how charting cycles can be used for birth control, though the method is much more effective than the failure-prone rhythm method of their parents' generation. "All I can say is, I will never be a politician," Weschler notes. (More contraception stories.)