The gorilla born at the Como Zoo to first-time mother Alice on Wednesday has died, the zoo announced Monday.
The "preliminary hypothesis" is there was difficulty with the newborn's feeding that led to the death Sunday, the zoo said in a statement.
The statement added that zoo leadership was making the announcement "with a very heavy heart." This was the first gorilla birth in the 55 years that Como has housed the large primates.
A zoo spokesman said the baby's death will be taken into account by zoo staff as another gorilla, Dara, is anticipated to give birth late this year or early in 2015.
"Each pregnant animal at the zoo has its own individual birth plan," said Como spokesman Matt Reinartz. "This will play a factor in Dara's plan as well."
Since the birth, the baby and Alice were under zookeeper watch and care around the clock, the zoo statement noted. The baby appeared to be doing well through Saturday evening, strong in grip and voice, and Alice had been taking well to motherhood.
But then, the statement read, staff started having difficulty keeping tabs on the baby's feeding regimen because Alice would cradle the newborn to her chest with her back toward zookeepers.
The statement then went on to describe the baby's final hours: