Senator Tammy Duckworth, a Democrat of Illinois, gave birth to a daughter, Maile Pearl Bowlsbey, on Monday, making her the first United States senator to give birth while in office, she said in a statement.

Ms. Duckworth said she and her husband, Bryan Bowlsbey, and their other daughter, Abigail, “couldn’t be happier to welcome little Maile Pearl as the newest addition to our family.”

“We’re also so grateful for the love and support of our friends and family, as well as our wonderful medical teams for everything they’ve done to help us in our decades-long journey to complete our family,” she said in a statement.



She said former Senator Daniel K. Akaka, a Democrat from Hawaii, “was able to bless her name for us” before his death last week. “His help in naming both of our daughters means he will always be with us,” she said.