[Quantitative determination of vitamin A levels in frozen preserved human amniotic membrane].

Purpose: Retinoids are associated with cell proliferation and differentiation. The levels of retinoids (vitamin A and its derivatives) in human amniotic membrane (AM) were measured to investigate whether endogenous retinoids in AM might contribute to the process of wound healing of the keratoconjunctival epithelium in AM transplantation.

Subjects And Methods: Retinoids were extracted from AM obtained from three patients following cesarean section.