Women face a 'broken rung' early on in the corporate ladder and are missing out on their first big promotions

• A Lean In and McKinsey report found that fewer women than men in entry-level jobs were promoted to manager.
• Lean In's CEO said fixing the "broken rung" would mean more women representation in the work pipeline.
• One thing that can be done is to remind people about biases ahead of promotion cycles.

Women's largest obstacle to career advancement is reaching the next rung on the ladder. A new study found that women are less likely than men to move up and become managers.