MUMBAI, Jan 12 Indian shares headed on Tuesday for their seventh losing session in eight, falling to fresh 1-1/2-year lows as risk aversion ahead of a slew of earnings, including from Tata Consultancy Services weighed on sentiment. Caution also prevailed ahead as data later in the day is expected to show consumer inflation edged up to an annualised 5.6 percent, which would likely prevent the central bank for cutting interest rates further for now.