Women make up almost half of India's 1.2 billion population, yet their economic potential has been largely ignored. Now, economists say women could hold the key to the future growth of Asia's third-largest economy.

Indian women can add $2.9 trillion, or 60 percent to annual GDP, by as early as 2025, if allowed to participate in the workforce on an equal basis as men, according to the 2015 McKinsey Global Institute Report.