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Table 1 Classification of cows into four stages according to pregnant status

From: Determination of reference intervals for metabolic profile of Hanwoo cows at early, middle and late gestation periods

Reproduction period

Duration

Non-pregnant

After calving or before pregnancy

Early-pregnant1

Day 1 to 95

Middle-pregnant

Day 96 to 190

Late-pregnant

Day 191 to 285

  1. 1The pregnancy tests were defined based to the plasma pregnancy-associated glycoproteins (PAGs) levels.