In industrialized countries, such as the United States, South Korea, and parts of Western Europe, the average age for menarche is generally between 12 and 13 years, although it can occur as early as 8 and as late as 16 or 17.
Di negeri - negeri industri, seperti Amerika Serikat, Korea Selatan, dan beberapa bagian Eropa Barat, usia rata - rata untuk haid pertama umumnya antara 12 dan 13 tahun, meskipun bisa juga 8 tahun dan bahkan 16 atau 17 tahun.