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Script: MIEZI 8 Takriban wiki 32 vipenyesi vya hewa uyavuni ( "alveoli") au chembe za mifuko za hewa huanza kuumbika. Yataendelea kuzalisha hata miaka 8 baada ya kuzaliwa mtoto. | ||
All ages referenced to fertilization, not last menstrual period. One month = 4 weeks. |