Birgitta is mentioned as the nurse with the responsibility of the royal children, who are confirmed to have had their own household from at least 1540 onward called Barnastugan ('Children's Crib').
The court staff are only fragmentary known from this period: aside from Birgitta, the royal children were supervised by the queen's cousin and namesake lady Margareta, the noble widow Ingrid Amundsdotter and occasionally, Ebba Eriksdotter Vasa and Christina Gyllenstierna.
[1] Evidently, Birgitta was a natural folk healer, who was apparently much trusted by the queen and her siblings for her medical ability.
She acted as the de facto personal physician and nurse to the queen when she was ill. On 15 March 1549, for example, the queen, who had recently been ill and tended to by Birgitta, recommended her to her sister, Martha Leijonhufvud, when she was informed that her sister was ill, and reportedly, Birgitta was an efficient physician who managed to cure at least Martha at this occasion.
After the death of queen Margaret, the king granted Brigitta Lars Anderssons the bishop's part of the income from the parish of Runtuna in Nyköping as an annuity for life.