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How to determine the time of parturition

How to determine the time of parturition

Svinovodstvo (5): 30-31

Impedance of the skin over the base of the 1st and 2nd pairs of teats was measured using a modified apparatus "Oestrometer-2" in the 19, 20 and 7 sows in the 1st, 2nd and 3rd pregnancies resp. For 162 readings obtained 7-12, 4-6 and 1-3 days before parturition, electrical resistance averaged 178.4, 179.1 and 168.0 ohms resp. in the 1st pregnancy, 184.6, 150.0 and 153.5 ohms in the 2nd, and 175.5, 148.0 ml 140.9 ohms in the 3rd.

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