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Script: Njengoba amaseli weengazi athoma ukuvela ngaphakathi komgodlana womthubi, imithambo yeengazi yakheka ku-embryo yoke, begodu nehliziyo elitjhubhu ithoma ukuvela. Kungasi kudala, ihliziyo ekhula njalo iyabhincana ngokwayo njengendlwana eyodwa ithome ukuvela. Ihliziyo ithoma ukuphefumula Emva kweemveke ezi-3 nelanga elilodwa ngemva kokumumatha (fertilization). Ihlelo lokukhambisa iingazi lihlelo lokuthoma lomzimbha, noma isichema samalunga ahlobeneko, ukufikela isikhathi sokusebenza. | ||
All ages referenced to fertilization, not last menstrual period. |