Sharing a new photo-gallery post to her Instagram account Tuesday, Montag wrote, “No words will ever be able to describe this miraculous moment of life!”
In the images, the new mom is breastfeeding Gunner as husband Spencer Pratt looks on and plants a kiss on his wife’s forehead.
Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.
RELATED VIDEO: Spencer Pratt and Heidi Montag Had Their First Baby — and It’s a Boy!
“I have never been so full of love, joy, gratitude, faith, and euphoria,” added Montag, 31. “The deepest love I have ever felt. So blessed to have a beautiful healthy baby @gunnerpratt .”
“Thank you God!” she continued. “Thank you @spencerpratt for being my rock and cheerleader.”
FROM PEN: Emily Maynard Johnson Admits She Was Ashamed to Stop Breastfeeding Her Second Son Early