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Table 1 Fertilization rate and percentage of penetrated oocytes forming male pronuclei in pig oocytes cultured under different conditions and fertilized with capacitated boar sperm.

From: Cumulus cells steroidogenesis is influenced by the degree of oocyte maturation

Treatment

MII oocytes

Fertilization rate

Oocytes forming male PN

M+H (n = 83)

90.2%a (n = 75)

84.0%a (n = 70)

66.0%a (n = 55)

M-H (n = 81)

70.3%a (n = 57)

78%a (n = 63)

30,7%b (n = 25)

MD (n = 80)

85.9a (n = 69)

56,3%b (n = 45)

6.0%c (n = 5)

  1. The cultures were carried out in the presence of gonadotropins and everted follicle walls (M+H) or in the absence of hormonal (M-H) or of both hormonal and cellular support (MD: matured denuded). Columns with different superscripts differ P < 0.01 (Ď…2 test)