Table 2 The development of embryos transferred to females who were stimulated at the estrus stage on the morning of ET.

From: Successful pseudopregnancy of rats by short period artificial stimulation using sonic vibration

Stimulation

Status of embryos

No. of females

No. of embryos transferred

No. (%) of embryos implanted

No. (%) of offspring

30 s, 2 times, 30 s interval

Two-cell

3

60

45 (75.0 ± 4.1)

41 (68.3 ± 10.3)

Pronuclear

3

60

43 (71.7 ± 14.3)a

40 (66.7 ± 14.3)a

  1. Percentages were showed as the mean ± SD.
  2. ET embryo transfer.
  3. aSignificant differences at P < 0.05, compared with females stimulated at proestrus for 30 s, 2 times with 30 s interval in Table 1.
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