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Table 1 Gestational status of dairy cows in artificial insemination (AI) record and confirmation of transrectal ultrasononography examination

From: Sonogram of coccygeus muscle in dairy cows with different gestational ages

No Groups AI record Ultrasononography
Number (n) Gestation (%) Number (n) Gestation (%) Sonogram
1 Non-pregnant 2 18.18 4 36.36 Empty uterine
2 Pregnant <1 month (8–24 days) 5 45.45 3 27.27 Gestational sac in uterine
3 Pregnant 2–3 months (70–90 days) 3 27.27 3 27.27 Placenta and fetal in uterine
4 Postpartum 2 week (12–14 days) 1 9.10 1 9.10 Lochia in uterine
  Total 11 100.00 11 100.00