The apparently inexorable rise in the proportion of "missing girls" in much of East and South Asia has attracted much attention amongst researchers and policy-makers. An encouraging trend was suggested by the case of South Korea, where child sex ratios were the highest in Asia but peaked in the mid-1990s and normalized thereafter. Using census data, we examine whether similar trends have begun to manifest themselves in the two large populous countries of this region, China and India. The data indicate that child sex ratios are peaking in these countries, and in many sub-national regions are beginning to trend towards less masculinization. This suggests that, with continuing vigorous efforts to reduce son preference, the "missing girls" phenomenon could be addressed in Asia.