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Table 1 Distribution of the cell cycle phases (in %) in distinct topographic regions of placentae at different stages of gestation in cattle

From: Patterns of cell proliferation and apoptosis by topographic region in normal Bos taurus vs. Bos indicus crossbreeds bovine placentae during pregnancy

   Placental region
   Placentome    
Cell cycle phase Groups: Days in gestation Total* Central region Edges Interplacentomal region Microplacentomes Placentomal fusion
G2/M G-I: 70 to 120 20.0 ± 11.4a, b 16.7 ± 7.0a, b 23.4 ± 15.9a 23.6 ± 3.1a 8.9 ± 6.2b, B 7.7 ± 4.3b
  G-II: 121 to 170 20.3 ± 10.2a 18.9 ± 9.3a 21.7 ± 11.1a 18.3 ± 9.3a 7.7 ± 2.1b, B 5.4 ± 3.4b
  G-III: 171 to 220 21.6 ± 12.1a, b 19.6 ± 13.7a, b 23.6 ± 10.6a 17.6 ± 9.4a, b 13.1 ± 12.4a, b 7.3 ± 4.1b
  G-IV: 221 to 290 18.8 ± 7.7 18.6 ± 5.9 19.0 ± 9.6 18.5 ± 6.5 21.8 ± 8.4a 12.1 ± 11.3
S G-I: 70 to 120 5.6 ± 3.5 5.7 ± 3.4 5.5 ± 3.6 5.6 ± 2.5 3.7 ± 3.1 3.1 ± 0.3
  G-II: 121 to 170 4.4 ± 0.9 4.6 ± 0.9 4.1 ± 1.1 3.0 ± 1.4 3.2 ± 0.7 3.4 ± 1.1
  G-III: 171 to 220 7.4 ± 4.6 10.2 ± 7.4 4.5 ± 1.8 5.0 ± 4.2 5.5 ± 4.6 3.6 ± 1.6
  G-IV: 221 to 290 5.6 ± 3.3 8.2 ± 4.9 3.0 ± 1.8 3.7 ± 2.6 4.4 ± 3.9 3.0 ± 1.5
G0/G1 G-I: 70 to 120 63.7 ± 16.3a, b 67.0 ± 13.8a, b 60.4 ± 18.9a 57.0 ± 9.1a 84.3 ± 11.8b 80.5 ± 10.9b
  G-II: 121 to 170 60.5 ± 18.1a 64.6 ± 13.8a 56.5 ± 22.3a 64.3 ± 18.3a, b 86.4 ± 2.0b 87.7 ± 3.9b
  G-III: 171 to 220 54.2 ± 20.7a 62.2 ± 18.1a, b 46.2 ± 23.4a 67.6 ± 15.7a, b 78.8 ± 18.5b 83.0 ± 7.1b
  G-IV: 221 to 290 56.1 ± 17.8 62.5 ± 10.0 49.8 ± 25.7 65.1 ± 15.8 71.2 ± 11.0 73.5 ± 22.1
Apoptosis G-I: 70 to 120 10.7 ± 8.5a 10.6 ± 8.5a 10.7 ± 8.5a 13.7 ± 9.8a 3.0 ± 2.6b 8.6 ± 8.5a
  G-II: 121 to 170 14.8 ± 8.9a 12.0 ± 5.7a, b 17.7 ± 13.3a 14.4 ± 8.9a 2.7 ± 0.4b 3.5 ± 0.7b
  G-III: 171 to 220 16.9 ± 7.9a, b 8.0 ± 3.7b 25.7 ± 13.9a 9.7 ± 8.2b 2.7 ± 2.1b 6.1 ± 3.3b
  G-IV: 221 to 290 19.5 ± 8.3a, b 10.7 ± 4.7b 28.2 ± 17.2a 12.7 ± 10.3b 2.6 ± 1.1b 11.4 ± 9.4b
  1. a-e Values (mean ± SD) in the same row with different superscripts differ (P < 0.05).
  2. A-E Values (mean ± SD) in the same column with different superscripts differ (P < 0.05).
  3. * Total means: central plus edges region of placentome