Sentence:  Accordingly , if epiphyseal diaphyseal fusion occurs in this phalanx near menarche , early and late menarches might have been forecast rather precisely at the <WSD>time</WSD> of Onset of ossification for the 18 girls with `` same schedule '' . 
Meaning of the word marked with <WSD> tags:  an indefinite period (usually marked by specific attributes or activities)