Effect of Oxytocin Administration or Natural Early Uterine Involution on Reproductive Traits, Progesterone Profile, and Milk Production of Friesian Cows | ||||
| Journal of Animal and Poultry Production | ||||
| Article 2, Volume 12, Issue 12, December 2021, Page 387-392 PDF (568.48 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2021.214570 | ||||
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| Authors | ||||
M. A. Abo-Farw  1; W. M. Nagy1; H. K. Zaghloul2
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| 1Animal Production Research Institute, Agricultural Research Center, Giza, Egypt. | ||||
| 2Higher Institute for Agricultural Co-Operation, Shoubra, Egypt. | ||||
| Abstract | ||||
| The present study aimed to compare reproductive performance, milk yield, and progesterone profile of Friesian cows diagnosed with late uterine involution (UI), natural early-UI, and those induced to early-UI by oxytocin (OXY). At calving, total of 30 normal multiparous lactating Friesian cows the experimental animals (n=30) were divided into two groups, one group (control, n=20) which were left normally without treatment up to complete UI, and another group (n=10) were i.m injected with 50 IU of OXY within 6-12 hours after parturition. Results showed that mean duration of UI was earlier (P<0.05) in early UI and OXY groups by 22.2 and 18.8% as compared to late UI. Estrus/service rate (ER) increased (P<0.05) in OXY as compared to late-UI, but did not differ significantly in early-UI. Postpartum 1st estrus PPFEI and service (PPFSI) intervals were shorter (P<0.05) in early-UI than in late-UI and OXY groups. Service period was lower (P≥0.05) in early-UI and OXY than in late-UI groups. Days open was lower (P<0.05) in early-UI than in late-UI. Pregnancy rate (PR) was higher (P<0.05) in early-UI and OXY than in late-UI. Reproductive index was higher in OXY than in late-UI (63.39 vs. 42.33%, P<0.05), and in early-UI than in late-UI (46.99 vs. 42.33%, P≥0.05). Milk production (weekly, daily, and total) was not affected. Early uterine involution naturally in lactating cows or inducing early uterine involution by oxytocin within 24 h of calving have a beneficial effect on the reproductive performance of lactating cows without adverse effect on milk production. | ||||
| Keywords | ||||
| Cows; uterine involution; oxytocin; reproductive performance; milk production | ||||
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