associated with femininity vary depending on location and context, and are influenced by a variety of social and cultural factors. Gender neutrality describes the idea that policies, language, and other social institutions should avoid distinguishing roles according to people's sex or gender, in order to avoid discrimination arising from rigid gender roles. Unisex refers to things that are considered appropriate for any sex. Campaigns for unisex toys include Let Toys Be Toys. Teenage pregnancy Teenage pregnancy is pregnancy in an adolescent girl. A female can become pregnant from sexual intercourse after she has begun to ovulate. Pregnant teenagers face many of the same pregnancy related issues as other women. There are, however, additional concerns for young adolescents as they are less likely to be physically developed enough to sustain a healthy pregnancy or to give birth. In developed countries, teenage pregnancy is usually associated with social issues, including lower educational levels, poverty, and other negative life outcomes; and often carries a social stigma. By contrast, teenage girls in developing countries are often married, and their pregnancies welcomed by family and society. However, in these societies, child marriage and early pregnancy often combine with malnutrition and poor health care and create medical problems. Girls' education Girls' equal access to education has been achieved in some countries, but there are significant disparities in the majority. There are gaps in access between different regions and countries and even within countries. Girls account for 60 per cent of children out of school in Arab countries and 66 per cent of non-attendees in South and West Asia; however, more girls than boys attend schools in many countries in Latin America, the Caribbean, North America and Western Europe. Research has measured the economic cost of this inequality to developing countries: Plan International’s analysis shows that a total of 65 low, middle income and transition countries fail to offer girls the same secondary school opportunities as boys, and in total, these countries are missing out on annual economic growth of an estimated $92 billion. Although the International Covenant on Economic, Social and Cultural Rights has asserted "primary education shall be compulsory and available free to all" girls are slightly less likely to be enrolled as students in primary and secondary schools (70%:74% and 59%:65%). Worldwide efforts have been made to end this disparity (such as through the Millennium Development Goals) and the gap has closed since 1990.