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Table 1 Morula formation rates depending on the time of first cleavage

From: Prostaglandin F (PGF) production possibility and its receptors expression in the early- and late-cleaved preimplantation bovine embryos

number of fertilized oocytes, n fertilization rate, n
(%)
early-cleaved embryos (30 hpi), n
(%)
late-cleaved embryos
(48 hpi), n
(%)
morula formation rate, n
(%)
morulas from early-cleaved embryos at Day 5, n (%) morulas from late-cleaved embryos at Day 5, n (%)
1242 794 336 458 420 166 254
  (63) (27)a (36)b (52,9) (58) (62,5)
  1. Proportion of embryos cleaved at 30 and 48 h post insemination (hpi) and formation of morulas at Day 5 of in vitro culture depending on the time of the first cleavage. Percent of early- and late-cleaved embryos was presented according to the number of fertilized oocytes. Morula formation rate was calculated according to the total number of cleaved embryos. Percent of early- and late- cleaved morulas was presented in relation to the total number of embryos cleaved at 30 and 48 hpi, respectively
  2. a,b Differences between cleavage rates (P < 0.0001)
  3. P values of cleavage rate determined by Chi-square test with Yates’ correction