Association between evaluation of the reproductive tract by various diagnostic tests and restoration of ovarian cyclicity in high-producing dairy cows
The uterine condition of clinically normal postpartum Holstein-Friesian dairy cows (n = 45) was evaluated once weekly (Weeks 3 to 7) by endometrial cytology, vaginal mucus collection device (VMCD), vaginoscopy, and ultrasonography to establish a relationship with postpartum resumption of ovulatory c...
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Published in | Theriogenology Vol. 72; no. 9; pp. 1153 - 1162 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier Inc
01.12.2009
[Oxford]: Butterworth-Heinemann; [New York]: Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | The uterine condition of clinically normal postpartum Holstein-Friesian dairy cows (n = 45) was evaluated once weekly (Weeks 3 to 7) by endometrial cytology, vaginal mucus collection device (VMCD), vaginoscopy, and ultrasonography to establish a relationship with postpartum resumption of ovulatory cycles. The time of first detection of the corpus luteum (CL) by ultrasonography and plasma progesterone concentration ≥1 ng/mL was recorded. By 49 d postpartum, 78% of the cows (n
=
35) had resumed ovarian function (CL group), whereas the remainder (n
=
10) had no CL (NCL group). There was a positive correlation between VMCD score and presence of fluid in the uterus in cows with a CL (P
<
0.01) during Week 3 postpartum but no significant correlation in cows without a CL. Percentage of polymorphonuclear leukocytes (PMN%) was higher in the NCL group (mean
±
SEM, 24.6
±
9.4%) than in the CL group (11.7
±
2.2%) during Week 5 postpartum (P
<
0.05). The PMN% (4.5
±
6.5%) and VMCD (0.5
±
0.5) scores during Week 5 in cows ovulating by Day 28 were lower (P
<
0.01) than the PMN% (15.0
±
14.3%) and VMCD (1.1
±
0.9) scores in those ovulating by Day 49. In conclusion, higher PMN% at 5 wk postpartum was associated with delayed resumption of ovarian cyclicity in high-producing dairy cows. |
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Bibliography: | http://dx.doi.org/10.1016/j.theriogenology.2009.07.007 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0093-691X 1879-3231 |
DOI: | 10.1016/j.theriogenology.2009.07.007 |