Oestrus synchronisation and superovulation alter the production and biochemical constituents of ovine cervicovaginal mucus

•Exogenous hormone use alters ovine cervicovaginal mucus characteristics.•Mucus is most abundant, clear in colour and less proteinaceous at oestrus.•Superovulation increases mucus production and protein concentration in Merino ewes.•Synchronisation of oestrus using PGF2α reduced volume of mucus prod...

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Bibliographic Details
Published in:Animal reproduction science 2016-09, Vol.172, p.114-122
Main Authors: Maddison, Jessie W., Rickard, Jessica P., Mooney, Ethan, Bernecic, Naomi C., Soleilhavoup, Clement, Tsikis, Guillaume, Druart, Xavier, Leahy, Tamara, de Graaf, Simon P.
Format: Article
Language:English
Subjects:
Animals
Cervicovaginal
Cervix Mucus - chemistry
Cervix Mucus - physiology
Chorionic Gonadotropin - administration & dosage
Chorionic Gonadotropin - pharmacology
Dinoprost - administration & dosage
Dinoprost - pharmacology
Estrus Synchronization
Female
Follicle Stimulating Hormone - administration & dosage
Follicle Stimulating Hormone - pharmacology
Hormone
Hydrogen-Ion Concentration
Life Sciences
Oestrogen
Oestrus
Other
Progesterone
Progesterone - pharmacology
Prostaglandin
Proteins - chemistry
Proteins - genetics
Proteins - metabolism
Sheep - physiology
Superovulation - drug effects
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Summary:•Exogenous hormone use alters ovine cervicovaginal mucus characteristics.•Mucus is most abundant, clear in colour and less proteinaceous at oestrus.•Superovulation increases mucus production and protein concentration in Merino ewes.•Synchronisation of oestrus using PGF2α reduced volume of mucus produced. Controlled breeding programmes utilising exogenous hormones are common in the Australian sheep industry, however the effects of such programmes on cervicovaginal mucus properties are lacking. As such, the aim of this study was to investigate cervicovaginal (CV) mucus from naturally cycling (NAT), progesterone synchronised (P4), prostaglandin synchronised (PGF2α), and superovulated (SOV) Merino ewes. Experiment 1; volume, colour, spinnbarkeit, chemical profile and protein concentration of mucus (NAT, P4, PGF2α and SOV; n=5 ewes/treatment) during the follicular (5 d) and luteal phases (8 d) was investigated. Experiment 2; in vivo mucus pH and in vitro mucus penetration by frozen-thawed spermatozoa (NAT, P4 and SOV; n=11 ewes/treatment) was investigated over oestrus (2 d) and the mid-luteal phase (pH only, 2 d). Oestrus mucus was more abundant, clearer in colour and less proteinaceous than luteal phase mucus (p
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2016.07.008