Blepharoptosis as a complication of pregnancy.

The complication of blepharoptosis occurred in an otherwise normal pregnancy. Its onset during the sixth month of the pregnancy suggests an etiology related to the increased estrogen levels normally occurring at this time. Infiltration of water molecules into the collagen ground substance of the levator muscle and its tendon is suggested as a possible mechanism of action. Similarities with other conditions in young individuals causing blepharoptosis are discussed.