In pet birds we generally perform a hysterectomy at the same time which prevents the disease recurring. Any episode of this puts the birds breeding future in doubt as there is always scarring and adhesions and there can be severe uterine damage. Especially common in hand raised hens which have imprinted onto humans. Signs other than the number of eggs are limited to loss of condition. Eventually malnutrition from pouring all her resources into egg production will result in abnormal eggs or egg binding due to uterine muscle dysfunction and general muscle weakness.
Treatment revolves around trying to switch off the laying cycle.
In some particularly determined hens all this will fail and it may be necessary to use hormonal injections. Injections will work for a period that can vary from as little as two weeks to up to six months. In some hens the only solution is hysterectomy. The maximum safe levels for production have not been determined in parrots. In the wild greater than two clutches per year is abnormal but this is quite often limited by feed availability.