... to HIV. In Latin America, there have been recent declines in the percent marrying by 18 in 6 of the 9 countries with data and recent rises in the percent having premarital sex in 3 of the 9 countries. ... marrying, having premarital sex by age 18, and having sex by 18 for young women living in 41 countries in 12 Africa (27), Asia (5) and Latin America (9) participating in the DHS in the 1990s.9 ... result from the competing influences of delays in the age of marriage and a rise in the percent initiating sex outside marriage. In Table 2, we show trends over the past twenty years in the percent...