Grygar I, Kudlác E, Dolezel R, Nedbálková J
Veterinary Centre Policná, Czech Republic.
Anim Reprod Sci. 1997 Dec 5;49(2-3):77-82. doi: 10.1016/s0378-4320(97)00027-4.
Ultrasonographical examinations of ovarian structures were performed in 27 inseminated cows at estrus days and on days 4, 9, 20, 25, 30, and 40 after ovulation. Three cows were used twice. Corpora lutea (CLs) with a cavity were compared with homogeneous CLs. in pregnant and nonpregnant cows. Diameters and volumes of CLs and cavities, as well as volumes of luteal tissue and concentrations of serum progesterone were determined. The volumes of the structures were calculated using a mathematical formula for a rotary ellipsoid. Homogeneous CLs and CLs with a cavity and their luteal tissue reached a maximum volume in nonpregnant and pregnant cows on day 9 after ovulation. At this time, CLs volumes were 7.52 +/- 3.14 (homogeneous CLs, n = 4) and 4.54 cm3 (CLs with a cavity, n = 1) in nonpregnant cows, and 6.05 +/- 1.71 (homogeneous CLs, n = 10) and 9.54 +/- 2.67 cm3 (CLs with a cavity, n = 15) in pregnant cows. The volumes of luteal tissue were 7.52 +/- 3.14 and 4.33 cm in nonpregnant cows and 6.05 +/- 1.71 and 8.62 +/- 3.46 cm3 in pregnant cows. Concentrations of progesterone in peripheral blood in pregnant cows bearing a homogeneous CLs or CLs with a cavity on day 9 were 3.15 +/- 0.69 ng ml-1 and 4.12 +/- 1.28 ng ml-1, respectively. The concentrations of progesterone were higher in pregnant cows in comparison with nonpregnant cows. CLs with a cavity in pregnant cows contained a higher volume of luteal tissue and higher secretory activity compared to homogeneous.
在发情期以及排卵后第4、9、20、25、30和40天，对27头授精母牛的卵巢结构进行了超声检查。三头母牛被使用了两次。将有腔黄体（CLs）与均质黄体在怀孕和未怀孕的母牛中进行比较。测定了黄体和腔的直径、体积，以及黄体组织的体积和血清孕酮浓度。使用旋转椭球体的数学公式计算结构的体积。均质黄体以及有腔黄体及其黄体组织在未怀孕和怀孕母牛排卵后第9天达到最大体积。此时，未怀孕母牛中均质黄体的体积为7.52±3.14（n = 4），有腔黄体的体积为4.54 cm³（n = 1）；怀孕母牛中均质黄体的体积为6.05±1.71（n = 10），有腔黄体的体积为9.54±2.67 cm³（n = 15）。未怀孕母牛黄体组织的体积为7.52±3.14和4.33 cm，怀孕母牛为6.05±1.71和8.62±3.46 cm³。在第9天怀有均质黄体或有腔黄体的怀孕母牛外周血中孕酮浓度分别为3.15±0.69 ng/ml和4.12±1.28 ng/ml。与未怀孕母牛相比，怀孕母牛的孕酮浓度更高。与均质黄体相比，怀孕母牛中有腔黄体含有更高体积的黄体组织和更高的分泌活性。
