Newly diagnosed: How probable are subsequent attacks

Hey everyone! My awesome wife, who is 32 years old, recently received two significant pieces of news: she is pregnant with our second child; but...she has lost most of her eyesight in her left eye and has experienced other unusual symptoms. After being diagnosed with Neuromyelitis Optica (NMO) shortly after learning about the pregnancy, I've been exploring this informative website and community to learn more.

However, I'm still uncertain about the probability of preventing further attacks if proper treatment is administered.

Since she was promptly diagnosed and will begin treatment during her pregnancy, can we anticipate a reduced likelihood of future attacks?

Could you share your personal experiences, especially if subsequent attacks occurred despite receiving treatment?

Thank you! I appreciate your support and guidance.