Randi Zuckerberg, who is director of marketing at Facebook and also the sister of CEO and co-founder Mark Zuckerberg — is leaving the company after six years to start a new media firm to help companies become more social. It's a scoop brought by Kara Swisher from AllThingsD.

And the main reason according to the article: She has been on maternity leave for the last three months, after having her first child, and sources said she has told them that being away from the rapid-fire pace at Facebook has given her time to reflect on what she wants to do in the next phase of her career.

In her resignation letter, published at AllThingsD, Zuckerberg says:

“I have spent my years at Facebook pouring my heart and soul into innovating and pushing the media industry forward by introducing new concepts around live, social, participatory viewing that the media industry has since adopted.

We have made incredible progress, but there is still much to be done and other ways I can affect change. Now is the perfect time for me to move outside of Facebook to build a company focused on the exciting trends underway in the media industry.”

Facebook confirmed the departure according to AllThingsD and in a statement said: “We can confirm Randi has decided to leave Facebook to start her own company. We are all grateful for her important service.”

Now we are probably getting a debate on women & babies in Tech. As long as you are working in the hard pace of a tech company, or any other professional environment, you just don't have the time to reflect on your carreer. And maturnity leave provides just that.

In this very same company, Sheryl Sandberg has a must discussed opinion about women staying in the workplace, even after having children.

Question remains, how much did Randi talk with Sheryl about her next move?