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KMID : 1023620090330030153
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Reproductive and Developmental Biology
2009 Volume.33 No. 3 p.153 ~ p.156
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Factors to Assess for Re-breeding after Parturition in Milking Cows
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Park Sung-Jai
Baek Kwang-Soo
Kim Hyeon-Shup
Jeon Byeong-Soon
Her Tai-Young
Lim Hyun-Joo
Kang Seok-Jin
Lee Hyun-June
Ki Kwang-Sook
Jo Woon-Mo
Kim Sang-Bum
Jung Young-Hun
Ahn Byeong-Seog
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Abstract
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The purpose of this study was to assess for re-breeding concentrate period in postpartum in milking cows. The 48 cows aged years and of body weight were examined every 3rd day from 15 to 36 day postpartum. Blood samples for progesterone and estradiol hormone analyses were withdrawn from the coccygeal vein every third day until the end of the experiment. The ovarian follicular numbers were verified and measured using a multi frequency probe. The least squares means are presented for each day by GLM of SAS. The results showed that ovary lengths (right ovary; , left ovary; ) were similar in right and left ovary activity level during estrous cycle of postpartum cows. We were judged completed uterus on day at level of cervix diameter. And we were monitoring started at from day 15 after postpartum. The results showed that mean plasma concentration of progesterone (3.28 ng/ml) in large follicle gradually increased days 30 in postpartum. And, monitoring of estradiol 176 (22.18 pg/ml) hormone during postpartum period would be useful to predict the ovarian and uterus activity for re-breeding in postpartum milking cows. From these results, we conclude that cervix diameter (mean: 2.31 cm) was very important for reproductive organ recovery standard level of postpartum milking cows, hormone secretion level (: 3.28 ng/ml, : 22.18 pg/ml) and body condition score () level about 30 days in postpartum period.
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KEYWORD
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Milking cow, Follicle, Progesterone, Estradiol
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