The document discusses sex selection and the current status of gender imbalance in India. It begins by explaining the natural sex ratio at birth and definitions of related terms. It then covers historical practices and myths related to sex selection. The document outlines current methods used for sex selection both pre-implantation and post-implantation. It discusses where sex selection occurs globally and within India and explores social, demographic, commercial and logistical reasons for sex selection. Metrics for measuring gender imbalance are defined and data on declining sex ratios in India over time is presented. The implications and challenges posed by the unbalanced sex ratio are also mentioned.