281—120.48 (34CFR303) Periodic review. At least every six months, or more frequently if conditions warrant or if the family requests such a review, a periodic review of the IFSP must be held to determine the degree to which progress toward achieving the outcomes is being made and whether modification or revision of the outcomes or services is necessary. Periodic reviews may be carried out by a meeting or by another means that is acceptable to a parent and other participants, such as a conference call. [34 CFR 303.342(b)]