Women early in their careers are far more likely to stumble on a "broken rung," or failing to get a promotion out of their entry-level jobs at the same rate as men, according to a new study from consulting firm McKinsey & Co. and Lean In, the nonprofit started by former Meta Chief Operating Officer Sheryl Sandberg. 

For every 100 male employees promoted from entry-level jobs to managerial roles, only 87 women received a similar promotion, according to the report. The broken rung is even harder to surmount for women of color, with only 73 receiving that first promotion for every 100 men who are moved up, the study found. 

That failure to climb the ladder isn't due to lack of ambition, with the survey of 27,000 workers finding that women have the same goals for advancing their careers as men. But bias may play a role, with corporate leaders often promoting young male employees on their potential, while young women are judged more by their track records — a tougher standard when female workers are just starting in their careers.