Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen.

Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Research Abstract Details 

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Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Abstract Text:

D Waberski,K F Weitze,T Gleumes,M Schwarz,T Willmen,R Petzoldt,

Precise data on fertility results following peri- and postovulatory insemination in spontaneously ovulating gilts is lacking. Using transcutaneous sonography every 4 h during estrus as a tool for diagnosis of ovulation, the effects of different time intervals of insemination relative to ovulation were investigated with liquid semen (Experiment 1, n=76 gilts) and frozen semen (Experiment 2, n=80 gilts). In Experiment 3 (n=24 gilts) the number of Day-28 embryos related to the various intervals between insemination and ovulation was determined after the use of liquid semen. Using liquid semen the fertilization rates based on Day-2 to Day-5 embryos and the number of accessory spermatozoa decreased significantly in gilts inseminated with 2 x 10(9) spermatozoa per dosage in intervals of more than 12 h before or more than 4 h after ovulation. In the time interval 4 to 0 h before ovulation, comparable fertilization rates were obtained using frozen semen (88.1%) and liquid semen (92.5%). Fertilization rates and numbers of accessory spermatozoa decreased significantly when gilts were inseminated with frozen semen more than 4 h before or 0 to 4 h after the detection of ovulation. The percentage of Day-28 embryos was significantly higher following preovulatory insemination compared to inseminations 0 to 4 h and 4 to 8 h after ovulation. It is concluded that the optimal time of insemination using liquid semen is 12 to 0 h before ovulation, and 4 to 0 h before ovulation using frozen semen. The results stress the importance of further research on sperm transport and ovulation stimulating mechanisms, as well as studies on the time of ovulation relative to estrus-weaning intervals and estrus duration.

Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Publishing Authors By Initials

D Waberski,KF Weitze,T Gleumes,M Schwarz,T Willmen,R Petzoldt,

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Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 42

Page Numbers: 831-40

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Oct

YEAR: 1994

Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Information

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LANGUAGE: eng

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AFFILIATION: Institute for Reproductive Medicine, Veterinary School of Hannover Bünteweg 15, D-30559 Hannover, Germany.

Country: United States

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MEDLINETA: Theriogenology

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