Kadangi terminas siejamas su nepakankamu kiekiu deguonies prieš gimdant ar gimdymo metu ir terminas yra fetal distress sinonimas, siūlau versti kaip vaisiaus hipoksija/pridusimas/nepakankamas vaisiaus deguonies kiekis/acidemija, priklausomai nuo konteksto.

https://www.summitmedicalgroup.com/library/adult_health/obg_...

Non-reassuring fetal status is a term used to describe suspected fetal hypoxia and is meant to replace the more ubiquitous term “fetal distress.” Fetal distress, defined as progressive fetal hypoxia and/or acidemia secondary to inadequate fetal oxygenation, is a term that is used to indicate changes in fetal heart patterns, reduced fetal movement, fetal growth restriction, and presence of meconium stained fluid.
(https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5139811/)