It wasn't weird to give birth in front of the respectful and quiet gallery visitors, she said.
"I had met them all ahead of time and got to know them a little through our conversations in the gallery," she said.
"They were sincerely interested in the project and really supportive of the process."
Kotak, an artist whose performances focus on everyday life experience, said had been in and out of the gallery in Brooklyn's Bushwick neighbourhood between Friday and Saturday, then returned Monday to continue being part of her exhibit. She and the baby will return daily until the installation closes on November 7.
She said is being visited by about 20 people a day, the same number who came to see her deliver Ajax in a birthing pool.
Gallery curator Elle Burchill said new features include the birth video and a large artwork by Kotak's husband, Jason Robert Bell.
Kotak said the finished work, which resembles a tree, incorporates the placenta, umbilical cord, and blood tissue.
- AAP