Groups of fetal nuclear fibers (N = 40 secondary fiber cells); imaginary pole is included to facilitate perception of lens shape. (A) Neither secondary fibers with opposite end curvature nor those without opposite end curvature extend from pole to pole. (B) Arrangement of secondary fibers to form anterior suture branch in Y suture. (C) Symmetric sutural latticework formed by offset anterior and posterior sutures in single fetal growth shell.