The order said in a statement that they are praying for everyone involved.
"We all feel that this is a tragic situation," said Sister Constance Veit, communications director at Little Sisters of the Poor.
Amoa arrived from the island nation of Samoa on Oct. 5 and was considered a postulant, someone who wants to be admitted to the order.
She initially told investigators that she did not know she was pregnant but that she experienced significant bleeding just prior to delivering the baby, whom she named Joseph.
She later said she had not told the convent about her past sexual activity and that after the child stopped breathing, she contemplated putting it in the trash but decided against it, police said.
Police say they interviewed a nun at the convent who said Amoa showed her the child and initially told her that she had found the body outside. The nun says Amoa later told her that she had given birth to the child, and police say the two of them together took the body to the hospital.