Uterine and Ovarian Blood Flows Measured with Transrectal Doppler Sonography during the Estrous Cycle in Cows
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概要
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Uterine and ovarian blood flows through the estrous cycle in cows were determined using transrectal color Doppler sonography, and the relationship between the change in uterine and ovarian circulations and the diameter of the ovulatory follicle (OF), area of corpus luteum (CL) and concentrations of plasma progesterone were investigated. Three non-lactating Deutsch Fleckvieh cows with a mean estrous cycle of 20.8±3.3 days and 5.7±1.5 years old were used. The sizes and locations of follicles and CL, blood flows in uterine and ovarian arteries were determined with color Doppler sonography, and plasma progesterone (P) concentrations were assayed over two estrous cycles. The uterine and ovarian arteries bearing the CL during the luteal phase (Day 0 to 15) and OF during follicular phase (Day -5 to -1) were referred to as dominant artery (Day 0 = ovulation). OF emerged on Day 9.2±3.3 (15.4±0.9 mm). Maximum area of CL was observed on Day 9.5±0.4 (525.1±100.6 mm^2). Plasma P showed maximum concentrations 3.8±0.7 ng/ml on Day 12. Mean pulsatility index (PI) values for the uterine artery during the luteal phase (2.5±0.3) were significantly higher than those of follicular phase (2.0±0.2). In contrast, mean time averaged maximum velocity (TAMV) values for the uterine artery during the follicular phase (21.8±2.3 cm/sec) were significantly higher than those of the luteal phase (17.5±1.8 cm/sec). Peak TAMV values were recorded on Day -4 (24.1±1.7 cm/sec) in the dominant uterine artery and on Day -3 (25.2±1.4 cm/sec) in the non-dominant artery. Mean PI values for the non-dominant ovarian artery (4.3±0.3) were significantly higher than those for the dominant artery (3.7±0.3) during the luteal phase, but there was no difference between mean PI values for each of the ovarian arteries (3.8±0.2, 3.8±0.1, respectively) during the follicular phase. Mean TAMV values during the luteal phase were significantly different between the dominant (11.8±0.9 cm/sec) and non-dominant ovarian arteries (9.4±1.0 cm/sec), but there was no difference between mean TAMV values for each ovarian artery (11.8±0.4 cm/sec, 11.4±0.8 cm/sec, respectively) during the follicular phase. Peak TAMV values were recorded on Day 11 (12.8±1.3 cm/sec) in the dominant artery and on Day -3 (12.2±1.1 cm/sec) in the non-dominant artery. Mean PI values for both uterine arteries during the follicular phase increased significantly compared with those of the luteal phase. In ovarian arteries, PI and TAMV values showed a difference between dominant and non-dominant arteries dependent on CL existence.
- 鹿児島大学の論文
- 2005-02-20
著者
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KAMIMURA Shunichi
Laboratory of Theriogenology, University of Miyazaki
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Kamimura Shunichi
Laboratory Of Theriogenology Kagoshima University
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Ando Takaaki
Laboratory Of Theriogenology Kagoshima University
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WEBER Frank
Gynaekologische und Ambulatorische Tierklinik der Lndwig-Maximilians- Universitaet Muenchen,
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STOLLA Rudolf
Gynaekologische und Ambulatorische Tierklinik der Lndwig-Maximilians- Universitaet Muenchen,
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LEIDL Werner
Gynaekologische und Ambulatorische Tierklinik der Lndwig-Maximilians- Universitaet Muenchen,
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HAMANA Katsumi
Laboratory of Theriogenology, Kagoshima University
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Weber Frank
Gynaekologische Und Ambulatorische Tierklinik Der Lndwig-maximilians- Universitaet Muenchen
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Leidl Werner
Gynaekologische Und Ambulatorische Tierklinik Der Lndwig-maximilians- Universitaet Muenchen
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Stolla Rudolf
Gynaekologische Und Ambulatorische Tierklinik Der Lndwig-maximilians- Universitaet Muenchen
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Hamana K
Laboratory Of Theriogenology Kagoshima University
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Hamana Katsumi
Laboratories Of Veterinary Reproduction
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Kamimura Shunichi
Laboratory Of Theriogenology Faculty Of Agriculture University Of Miyazaki
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