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Ultrasonographic measurement of stallion accessory sex glands and excurrent ducts during seminal emission and ejaculation.
Biol Reprod. 1993 Aug; 49(2):267-73.BR

Abstract

Accessory sex gland and excurrent duct activity of 10 stallions was visualized with transrectal ultrasonography during seminal emission and ejaculation. First and last penile urethral contractions were defined as the start (0 sec) and end of ejaculation, respectively. Duration of ejaculation (n = 63 ejaculations) averaged 6.15 +/- 2.98 sec. Penile urethral contractions occurred an average of 6.2 +/- 2.2 times per ejaculation. Right bulbourethral glands (n = 19 ejaculations) alternated repeatedly from ovoid to flattened, irregular shapes during ejaculation. Cross-sectional area of right bulbourethral glands did not change (p > 0.40) between 3 sec before ejaculation and the end of ejaculation. Cross-sectional area of right prostatic lobes (n = 17 ejaculations) decreased (p < 0.01) between 3 sec before ejaculation and the end of ejaculation, with decreases (p < 0.05) at 2, 1, and 0 sec before ejaculation and at the time of the second penile urethral contraction. Excurrent ducts of ampullae (n = 17 ejaculations) first appeared to dilate with fluid at 2.60 +/- 0.23 sec before ejaculation and subsequently dilated an average of 3.4 +/- 0.3 times between 3 sec before ejaculation and the end of ejaculation. Fifty-three of 58 (93%) ampullar duct dilations occurred prior to the start of ejaculation. During each dilation of ampullar ducts, fluid remained visible for 0.23 +/- 0.04 sec. Fluid was detected within the lumina of vesicular gland excurrent ducts during the 6 of 17 monitored ejaculations that produced detectable gel.(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Department of Animal and Veterinary Science, University of Idaho, Moscow 83844-2201.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8373949

Citation

Weber, J A., and G L. Woods. "Ultrasonographic Measurement of Stallion Accessory Sex Glands and Excurrent Ducts During Seminal Emission and Ejaculation." Biology of Reproduction, vol. 49, no. 2, 1993, pp. 267-73.
Weber JA, Woods GL. Ultrasonographic measurement of stallion accessory sex glands and excurrent ducts during seminal emission and ejaculation. Biol Reprod. 1993;49(2):267-73.
Weber, J. A., & Woods, G. L. (1993). Ultrasonographic measurement of stallion accessory sex glands and excurrent ducts during seminal emission and ejaculation. Biology of Reproduction, 49(2), 267-73.
Weber JA, Woods GL. Ultrasonographic Measurement of Stallion Accessory Sex Glands and Excurrent Ducts During Seminal Emission and Ejaculation. Biol Reprod. 1993;49(2):267-73. PubMed PMID: 8373949.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultrasonographic measurement of stallion accessory sex glands and excurrent ducts during seminal emission and ejaculation. AU - Weber,J A, AU - Woods,G L, PY - 1993/8/1/pubmed PY - 1993/8/1/medline PY - 1993/8/1/entrez SP - 267 EP - 73 JF - Biology of reproduction JO - Biol. Reprod. VL - 49 IS - 2 N2 - Accessory sex gland and excurrent duct activity of 10 stallions was visualized with transrectal ultrasonography during seminal emission and ejaculation. First and last penile urethral contractions were defined as the start (0 sec) and end of ejaculation, respectively. Duration of ejaculation (n = 63 ejaculations) averaged 6.15 +/- 2.98 sec. Penile urethral contractions occurred an average of 6.2 +/- 2.2 times per ejaculation. Right bulbourethral glands (n = 19 ejaculations) alternated repeatedly from ovoid to flattened, irregular shapes during ejaculation. Cross-sectional area of right bulbourethral glands did not change (p > 0.40) between 3 sec before ejaculation and the end of ejaculation. Cross-sectional area of right prostatic lobes (n = 17 ejaculations) decreased (p < 0.01) between 3 sec before ejaculation and the end of ejaculation, with decreases (p < 0.05) at 2, 1, and 0 sec before ejaculation and at the time of the second penile urethral contraction. Excurrent ducts of ampullae (n = 17 ejaculations) first appeared to dilate with fluid at 2.60 +/- 0.23 sec before ejaculation and subsequently dilated an average of 3.4 +/- 0.3 times between 3 sec before ejaculation and the end of ejaculation. Fifty-three of 58 (93%) ampullar duct dilations occurred prior to the start of ejaculation. During each dilation of ampullar ducts, fluid remained visible for 0.23 +/- 0.04 sec. Fluid was detected within the lumina of vesicular gland excurrent ducts during the 6 of 17 monitored ejaculations that produced detectable gel.(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0006-3363 UR - https://www.unboundmedicine.com/medline/citation/8373949/Ultrasonographic_measurement_of_stallion_accessory_sex_glands_and_excurrent_ducts_during_seminal_emission_and_ejaculation_ L2 - https://academic.oup.com/biolreprod/article-lookup/doi/10.1095/biolreprod49.2.267 DB - PRIME DP - Unbound Medicine ER -