If your daughter maintains an Hb of 9-9.5 she won't experience any growth or development issues. The level needed to lead a "normal" life will vary among different people so no set level is meaningful. We see intermedias with Hb's of 7 who are very active and lead normal lives. For a woman, an Hb of 10 or higher may be enough. A lower Hb may mean nothing more than some occasional tiredness, but it varies so much in HbH that it is very hard to predict. What is extremely encouraging is that her Hb has risen so much. She seems to be over whatever it was that caused the low Hb and like many with HbH, she may likely lead a fairly normal life.