"Giving birth was the most intense and life-changing experience," Bündchen, 29, writes. "I am blessed to have been able to have a home birth surrounded by love, where I was able to feel safe. It was a powerful experience. I never felt so vulnerable but so strong at the same time."
"I was so present to witness the biggest miracle in my life happen before my very own eyes," her post continues. "To give life to another being – what a gift!"
When baby Benjamin, the supermodel's first son with husband Tom Brady, was placed in her arms, "I looked into his precious eyes and felt an overwhelming, unconditional love," she writes. "I felt a huge sense of accomplishment . . . I never felt so complete and empowered in my life."
Bündchen also credits her mother, Vania, for being such a positive role model. "I grew up witnessing my mother always trying her best at doing all she could for the 6 of us girls. My mom devoted her entire life to her family and did it with such grace," she writes. "She is my hero. She is the reason why I believe that a woman is the core of a family."
Continues the supermodel: "I can only hope to be for my kids what she will and always be for us – our rock."