A professor who knows me very well is currently on maternity leave (her baby arrived in late April).
This professor has known me for 4 years (since first semester of undergraduate career) and also advised my undergraduate thesis (2 semesters). In addition I also did an independent study course with her, and she has provided me funding from her own grant money in the past in order to pay for me attending academic conferences.
I am planning to apply to several master's programs, possibly PhD, in addition to other things that require such letters (Teach for America, Summer School, etc.). All of these things require letters of recommendation.
Is it appropriate to ask her for letters of recommendation on her maternity leave, and if so, how should the request be phrased in email?