Fergie, 38, and actor husband Josh Duhamel welcomed Axl on August 29, reported People magazine.
"My everyday heels have become lower. But on the other hand I'm still a woman - and women like to dress up - so high heels are still very much in the mix!," she said.
The 'Fergalicious' singer also has a successful footwear line, Fergie Footwear, which she recently showcased at an event at Macy's in Las Vegas during the MAGIC fashion convention.
Asked if she would like to create a line for kids, the mother of one said, "Not yet. Well my plate is pretty full at the moment. I keep a wait and see attitude about any other design partnership as I always want to make sure that the product is true to me.