The baby is due in November and her family made a neat video for the announcement.
https://twitter.com/AlysiaMontano/status/857247357175349248
As you may remember, Montaño ran at USAs while pregnant in 2014 (she finished last in her heat in 2:32.13). For those wondering, she does have the qualifying time for USAs this year. And she wouldn't be as far along -- in 2014, she was 7 months pregnant, this year, she'll only be 4 months pregnant.