Type of pump	Mother staying at home; occasionally separated from infant for more than 4 hours	Mother working part time† infant less than 6 months of age	Mother working part time† infant more than 6 months of age	Mother working full time‡ infant less than 6 months of age	Mother working full time‡ infant more than 6 months of age	Mother having problems with milk supply or nipple pain
Manual pump	X		X		X
Battery-powered pump	X		X		X
Electric diaphragm pump	X	X	X		X
Electric piston pump	X	X§	X	X§	X§	X
Hospital-grade electric piston pump				X		X§