A recent and sound report based on an extensive global survey, looking at the latest progress of gender diversity in business leadership.

No revolutionary findings (yes, women work differently than men, parenthood requires women to make sacrifices) but the merit of stating the too often undermined obvious (a third of the businesses still have NO WOMEN in their senior leadership team !)
Take away for businesses: invest in mentoring and sponsorship, design attractive leadership roles
Take away for women : go for this stretching assignment and ask your organization to tackle gender bias !