In both Greek and Roman mythology, she was one of three "fates", which determined the destiny of people. Nona was the fate of "life/pregnancy", which you would pray upon if you had a child being born soon.

Are the three Fates they're small goddesses, but they do have a big impact. I don't remember their names.

In Greek mythology the three Fates are Klotho, Lachesis, and Atropos. In Roman mythology the three Fates are Decima, Nona, and Morta.

Coltho was not of the Roman pantheon. She was one of the three Fates, the youngest after Atrpopos and Lachesis, and was responsible for spinning the thread of human life and determining the time of birth.

Her counterpart in Roman mythology was Nona.

The Roman Goddess of Pregnancy is Nona. She is also one of the fates, the one that measures the life thread, in Roman Mythology. Her name means "nine" and women would call on her in the ninth month of their pregnancy.