Shortly after her water broke, her first child, Alexandre was born -- extremely premature and tiny, weighing just 1 pound, 10 ounces. The infant could fit inside his father's hand.
While Alexandre was nursed in an incubator down the hospital hall, his twin brother was left inside his mother's womb to grow bigger and stronger. Because Alexandre's placenta and umbilical cord were left inside his mom, she was forced to take antibiotics to ward off infection.
Twenty-four days after Alexandre was born, his brother Ronaldo emerged -- his extra time in the womb well spent. Ronaldo weighed 3 pounds, 3 ounces.
"That time made a crazy difference," said da Silva. "He was born like a regular baby. He didn't need a breathing tube or anything."
Now, three months after the first of the two was born, both boys are tipping the scales at more than 6 pounds. Alexandre and Ronaldo are expected to be able to leave the hospital in just a few days, around the time of their original due date.
"One twin was born in winter, and one was born in spring," da Silva said. "They're my miracle babies."