Reed Smith is the latest firm in Big Law to make some relatively inexpensive accommodations for new mothers in an attempt to relieve—and retain—lawyer moms.

The firm announced this week that it now provides breast milk shipping for lawyers on business trips, and that it has installed hospital-grade, multiuse breast pumps in its offices' lactation centers. The firm is also paying for lawyers to take part in an online class called Mindful Return, which coaches professionals about moving from maternity leave back to working life.

The cost of these programs is nominal. A 34-ounce overnight milk shipment costs $139, the office breast pumps cost roughly $1,000 per office and the four-week online course costs $99 per person. But the firm is hoping for a greater return on the investment, in the form of a culture shift and the ability to ease women lawyers' rise in the ranks. Losing good lawyers, after all, can be much more costly.