Determination of gestational age by measuring placentomes in crossbred cows

Abstract

The determination of gestational age in cows has been an important tool in reproduction, since a better criterion in relation to gestational age in a cow was evident through the placentomes, seeking to be more efficient when detecting pregnancy. This study was developed at the Universidad Técnica del Norte. That is why exact data were collected from 42-60 days of gestation, measuring length 1.44 ±0.38 and width 1.01 ±0.25; 61-90 days length 2.29 ±0.35, width 1.85 ±0.5; 91-120 days length 3.1±0.14 and width 2.29±0.32 and 121-150 days length 3.24±0.10 and width 2.46±0.31. On the other hand, 46 pregnant cows (151-180 days) were also analyzed, length 3.60±0.15 and width 3.07±0.09; 24 pregnant cows (181-210 days) length 4.01±0.43 and width 3.16±0.13; 20 pregnant cows (211-240 days) length 5.23±0.63 and width 3.62±0.5; 25 pregnant cows (241-270 days) length 6.54±0.26 and width 4.99±0.46, in this case only data were taken from the caudal placentome due to the gestation time and the fetus is much more developed, the objective was to determine the age gestational with the measurement of placentomes in cows, it can be concluded that from the data obtained in the different stages of gestation a guide to understand days of gestation and the normal development of the fetus.