HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Puglisi, T. A. Articles by Kraeling, R. R. Search for Related Content PubMed PubMed Citation Articles by Puglisi, T. A. Articles by Kraeling, R. R.

Corpus Luteum Function following Subtotal Hysterectomy in the Prepuberal Gilt

University of Georgia, Athens 30602 and U.S. Department of Agriculture, Athens 30604

³ To whom correspondence should be addressed

Abstract

The effect of subtotal hysterectomy on maintenance of induced corpora lutea (CL) in prepuberal gilts, 120 to 130 days of age, was studied. Ovulation was induced with 1,000 IU Pregnant Mare Serum Gonadotropin (PMSG) followed 72 hr later with 500 IU Human Chorionic Gonadotropin (HCG). Thirteen gilts (bred controls) were inseminated on Day 0 (Day following HCG=Day 0). Fifty gilts were laparotomized on Days 6 through 9, their CL marked with charcoal and the gilts subtotally hysterectomized so that the amount of cervix and uterus left intact was: group 1 (n=13), posterior half of cervix; group 2 (n=12), cervix and posterior half of the uterine body; group 3 (n=12), cervix and uterine body; group 4 (n=13), posterior half of cervix and anterior 15% of one uterine horn. At necropsy (Day 30), three bred control gilts were pregnant while the ovaries of the remaining controls had only corpora albicantia (CA) present. The percentage of CL maintained to Day 30 for groups 1 through 4 were, respectively; 85.7, 65.9, 37.1 and 31.2. Based on these results, we suggest that, unlike mature gilts in which at least 25% of one uterine horn must be present to cause luteal regression and in which the presence of only the uterine body fails to cause luteal regression, as little as 15% of one uterine horn or the uterine body left intact will cause regression in the prepuberal gilt.

¹ Department of Animal and Dairy Science, University of Georgia, Athens.

² Richard B. Russell Research Center, Agricultural Research Service, USDA.

⁴ The authors gratefully acknowledge Ms. E. Paige Jordan and Mr. Bennett Johnson for valuable technical assistance.