"And it's a baby boy," Singh posted on Twitter.
The olympic bronze medallist has a five-year-old son Abir.
He said it is a coincidence that another Olympian MC Mary Kom's son's birthday also falls on the same day.
"I am really happy and my family is complete now. There have been several ups and downs in the last few days.
"I was busy with election campaigning at a time when my wife needed me the most. She was really strong through that phase and I salute her," he told PTI.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)