The firm is particularly targeting India, and has raised its profitability target for international stores.
It expects its total overseas network sales to double to £1bn ($1.6bn) by 2014.
As well as expansion in many of its existing 53 markets, Mothercare said it had identified Latin America, Scandinavia, Japan, South Korea, Vietnam and North Africa as areas for future growth.
It will open 175 overseas stores in its 2010-11 financial year, up from a previous target of 150, and 150 a year from 2011-12 onwards, up from a previous 100. The move will increase overseas selling space by about 15-20 per cent a year.
The firm said it would have 70 stores in India by March, and would increase that to at least 200 by March 2015.
It is also targeting a 20-30 basis point increase in international profit margins per year, up from its previous goal of 10-20 basis points.