If women don't have more children, we'll face an aging workforce, slack consumer demand, and a stagnant economy. With little access to childcare, family leave, health care - especially in the US - and with insufficient male participation, women are conducting a spontaneous birth strike. In other countries, panic over low birth rates has led governments to underwrite childbearing with generous universal programs, but in the U.S., women have not yet realised the potential of their bargaining position. When we do, it will lead to new strategies for winning full access to abortion and birth control, and for improving the difficult working conditions U.S. parents now face when raising children.