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“As stated before, hypothyroidism may cause premature or delayed puberty. The majority of normal and hypothyroid females begin their cycle at ages 12 or 13. However, a growing number of those with hypothyroidism start their cycle years earlier or begin their periods at age 15 or later. Premature or delayed puberty in males is also becoming more common.” — Mark Starr
As stated before, hypothyroidism may cause premature or delayed puberty. The majority of normal and hypothyroid females begin their cycle at ages 12 or 13. However, a growing number of those with hypothyroidism start their cycle years earlier or begin their periods at age 15 or later. Premature or delayed puberty in males is also becoming more common.