The court doesn't need to mention it to discreetly take it into account. Otherwise why wait until April to begin the sentence? Did they mention the pregnancy there? This is a legal, social, and political orchestration process, not a computational system.
There are lots of reasons the BOP would prefer to avoid incarcerating pregnant women. Surrenders are usually 4-6 weeks out; with the holidays, that pushes out into January. She's not getting that much of a break.
