UNITED NEWS INTERNATIONAL (UNI) — Sen. Tammy Duckworth has given birth to a daughter, becoming the first U.S. senator to give birth while in office.

According to a statement from her office, Duckworth and her husband, Brian Bowlsbey, welcomed a baby girl, Maile Pearl, on April 10.

Maile’s birth marked the first time a sitting senator has delivered a child.

Ten members of the House of Representatives have given birth while in office — including Duckworth, who gave birth to her first child in 2014 while serving in Congress.

Duckworth, who plans to take 12 weeks of maternity leave, said that she will be sticking around Washington so she can return to the Senate to vote, if needed.

Duckworth has been an outspoken proponent for working mothers. She said she’s currently working with party leadership to change Senate rules that prohibit bringing children to the chamber floor.