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In the majority of adult men, the [[foreskin]] normally retracts to reveal the head of the penis. In newborns, it is common for the foreskin to be fused to the head of the penis by the [[synechia]], thus rendering it non-retractable. The preputial cavity is sealed by the [[synechia]].<ref name="fleiss-hodges-vanhowe1998"/> The foreskin usually separates from the glans and becomes retractable with increasing age. There is much uncertainty among health care workers about when the foreskin of a boy should become retractable.<ref>{{REFjournal

Almost all boys are born with the foreskin fused with the underlying glans penisby the [[synechia]]. Most also have a narrow foreskin that cannot retract. Non-retractile foreskin is normal at birth and remains common until after puberty (age 18). Some boys develop retractile foreskin earlier, and about 2 percent of males have a non-retractile foreskin throughout life. Non-retractile foreskin is not a disease and does not require treatment.