Innovation and Sustainability

Hoang, Cuong Van; Hoang, Thinh Gia; Vu, Hai Nam; Le, Dat Anh

doi:10.1007/978-3-030-22438-7_42-1

Cited by 1 publication

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As in other species, sperm surface proteins and glycoproteins of the boar play an important role in capacitation, the acrosome reaction, the interaction with the egg zona and the fusion with the egg plasma membrane (Flechon, 1979;Peterson et al, 1984Peterson et al, , 1987Saxena et at, 1986; Klint et at, Claus ei at, 1988;Hoang-Vu, 1987;and R. Claus & D. Schams, unpublished data. ) 1987).…”

Section: Effects Of Seminal Components On the Female Immune Systemmentioning

confidence: 96%

“…In semen conjugated oestrogens are mainly represented by oestrone sulphate and unconjugated oestrogens by oestrad iol and oestrone. Due to the high volumes of ejaculates, amounts up to 11-5 pg (5 pg oestradiol, 2 pg oestrone and 4.5 pg oestrone sulphate) have been measured in semen (Hoang-Vu, 1987). Such amounts are likely to exert physiological reactions in the female.…”

Section: Seminal Oestrogens: a Peculiarity Of The Boarmentioning

confidence: 99%

“…The infusion of volumes of only 10 ml through uterine lumen catheters excluded mechanical stimulation and clearly demonstrated that oestrogens specifically increase the contraction frequency in the sow ( -Vu, 1987;Claus et al, 1989. ) at Day 0 this increase was about 2-fold and significant from the 2nd until the 4th hour after infusion.…”

Section: Influence Of Seminal Oestrogens On Uterine Contractionsmentioning

confidence: 99%

See 2 more Smart Citations

Physiological role of seminal components in the reproductivetract of the female pig

Claus¹

2020

Proc

View full text Add to dashboard Cite

In many species the appearance of oestrus is sufficient to ensure that the time of ejaculation, sperm transport and capacitation are balanced with the time of ovulation. In the pig these phenomena vary considerably and require additional regulatory mechanisms which are partly explained by seminal components. Boar semen is rich in oestrogens (up to 11.5 pg/ejaculate). Infusion of saline with the addition of oestrogens in physiological amounts increased the myometrial contraction frequency up to 2.5-fold. This effect is explained by a release of PGF-2a immediately after oestrogen infusion. Such an infusion also raises peripheral oestrogen concentrations and an effect on LH release can be demonstrated. Additionally, PGF-2a is measurable in uterine vein plasma after oestrogen infusion and is transferred into the follicular fluid. The effect of oestrogens on LH and follicular PGF-2a is likely to contribute to the timing of ovulation in response to mating. A specific protein of Mr 100 000-110 000 has been detected in boar seminal plasma and it exerts a strong immunosuppressive effect. This protein may be involved in a protection of spermatozoa but also of early embryos against female immunological attack. The addition of such specific compounds to AI doses, in which seminal plasma is diluted, may improve prolificacy.

show abstract

Section: Effects Of Seminal Components On the Female Immune Systemmentioning

confidence: 96%

Section: Seminal Oestrogens: a Peculiarity Of The Boarmentioning

confidence: 99%

Section: Influence Of Seminal Oestrogens On Uterine Contractionsmentioning

confidence: 99%

See 1 more Smart Citation