Supermodel Gisele Bündchen may not be getting much sleep since giving birth to her first child, Benjamin, with husband Tom Brady in December, but she isn't sweating it.

She tells Brazil's Folha de Sao Paulo newspaper (via PEOPLE) that "I haven't slept much," admitting she's up at all hours breast-feeding. "It is really tiring, but it's such a special moment that I am enjoying it to the maximum. I have dedicated my days completely to him."

She admits becoming a mother has changed her for the better. "To be a mother is a magical experience. The whole body is transformed by this," she says. "It really is the miracle of life. I am really happy!"