Cervical patency during non-ovulatory and ovulatory estrus cycles in domestic cats

Theriogenology
K ChatdarongCatharina Linde Forsberg

Abstract

The cervix functions as a barrier to spermatozoa. Vaginal artificial insemination in cats is, therefore, likely to be successful only at the period of estrus when the cervix is open. This study aimed to define the period of cervical patency in cats in both non-ovulatory and ovulatory estrus cycles. A total of 15 reproductive cycles were studied in six cats during the estrous stage. Cervical patency was monitored with the cats under sedation, by infusing 2 mL of Iohexol contrast medium via a 3.5 French tomcat catheter into the cranial vagina during estrus. Day one of estrus was defined as the first day the cats showed estrous behavior. Non-ovulatory cycles were characterized by a serum progesterone concentration on days 11-15 that was below 5 nmol/L and a normal interestrus interval of 7-14 days. Ovulatory cycles were characterized by a serum progesterone concentration on days 11-15 that was above 5 nmol/L and an interestrus interval that exceeded 30 days. The cervix was considered to be open when the contrast medium was seen to enter the uterus, and to be closed when the contrast medium remained in the vagina. Blood samples were collected at each examination and were assayed for estradiol-17beta and progesterone concentrations....Continue Reading

References

Nov 1, 1975·Biology of Reproduction·S R PaapeG H Stabenfeldt
Sep 1, 1983·Journal of Reproduction and Fertility·V M ShilleG H Stabenfeldt
Aug 1, 1980·Biology of Reproduction·P ConcannonD Lein
May 1, 1982·Biology of Reproduction·D H Banks, G Stabenfeldt
May 1, 1995·Journal of Reproduction and Fertility·L D SilvaJ P Verstegen
Sep 1, 1995·Journal of the American Animal Hospital Association·M V RootP N Olson
Dec 29, 2000·The Journal of Veterinary Medical Science·A TanakaT Tsutsui
Feb 24, 2001·The Journal of Veterinary Medical Science·T TsutsuiT Hori
Oct 2, 2002·Reproduction in Domestic Animals = Zuchthygiene·K ChatdarongC Linde-Forsberg

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Citations

Jul 25, 2008·Reproduction in Domestic Animals = Zuchthygiene·E Axnér
Jan 1, 2014·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·Meghan WoodlandBronwyn Crane

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