Here is more documentation, broken down by various categories, showing that the U.S. has the highest teen pregnancy and birth rates of any developed nation. The U.S. teen birth rate of 52.1 per 1,000 female teens is higher than second-ranked U.K. by 21 per 1,000. However, long-term trends indicate a relative slowdown in the U.S. teen birth rate compared with other developed countries. Birth rates have decreased in Ireland and Japan. 32 pages. $12, free online. UNICEF Innocenti Research Centre, Piazza SS Annunziata 12, 50122, Florence, Italy. 39-055-20-33-0, www.unicef-icdc.org.