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Table 1 Maximum number of female germ cells reached in fetal ovaries during gestation in different species and the number of germ cells in the ovaries at the time of birth or nearly after

From: Ultrastructural changes in oocytes during folliculogenesis in domestic mammals

Species Maximum number of germ cells(Day of gestation) Number of germ cells close after birth(Day after birth)
Calf [20] 2,700,000 (110) 68,000 (13 days after birth)
Pig [21] 1,100,000 (50) 500,000 (at birth)
Buffalo [22] 23,540 (210) 20,000 (at birth)
Rat [23] 75,000 (18) 27,000 (2 days after birth)
Human [24] 6,800,000 (150) 2,000,000 (at birth)