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Animals
Special Issues
Equine Fertility: Embryo-Maternal Communication and Embryo Loss in the Mare
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Equine Fertility: Embryo-Maternal Communication and Embryo Loss in the Mare

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Reproduction".

Deadline for manuscript submissions: closed (25 July 2023) | Viewed by 2193

Special Issue Editor

Dr. Juan Cuervo-Arango

E-Mail Website
Guest Editor
Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Spain
Interests: mare; embryo; ovulation; embryo–maternal communication; assisted reproductive techniques; embryo transfer; ovum pick up
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The embryo-maternal communication in the mare plays an essential role in the overall equine fertility. Historically, research has focused on embryo loss after pregnancy diagnosis (i.e., >14 days post-ovulation). Although this has a significant impact on the overall reproductive efficiency of the mare, more embryos are likely to be lost before this time. Understanding the relevance of endometrial and embryo factors involved in these losses is paramount to create strategies to improve the efficiency of mare reproduction, both natural and by assisted reproductive techniques.   

This Special Issue aims to increase the knowledge on the area of embryo-maternal communication in the mare. Original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: 1) embryo loss, 2) maternal recognition of pregnancy, 3) endometrial receptivity (key genes and proteins involved in embryo development and survival) at early stages of pregnancy (<14 days of pregnancy), 4) embryo-recipient synchrony for in vitro produced and in vivo derived embryos, 5) effect of progesterone and estrogens on endometrial receptivity.

I look forward to receiving your contributions.

Dr. Juan Cuervo-Arango
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • mare
  • embryo loss, endometrial receptivity, maternal recognition of pregnancy
  • embryo transfer
  • embryo-uterine synchrony
  • steroids hormones (estrogens and progesterone)

Published Papers (1 paper)

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Research

14 pages, 500 KiB  
Article
The Timing of the Maternal Recognition of Pregnancy Is Specific to Individual Mares
by John R. Newcombe, Juan Cuervo-Arango and Sandra Wilsher
Animals 2023, 13(10), 1718; https://doi.org/10.3390/ani13101718 - 22 May 2023
Cited by 1 | Viewed by 1838
Abstract
The present experiment aimed at determining whether the timing of the maternal recognition of pregnancy (MRP) was specific to individual mares by determining when luteostasis, a failure to return to oestrus, reliably occurred in individuals following embryo reduction. Singleton (n = 150) and [...] Read more.
The present experiment aimed at determining whether the timing of the maternal recognition of pregnancy (MRP) was specific to individual mares by determining when luteostasis, a failure to return to oestrus, reliably occurred in individuals following embryo reduction. Singleton (n = 150) and synchronous twin pregnancies (n = 9) were reduced in 10 individuals (5–29 reductions/mare) at pre-determined time points within days 10 (n = 20), 11 (n = 65), 12 (n = 47), 13 (n = 12) or 14 (n = 15) of pregnancy. Prior to embryo reduction, the vesicle diameter was measured in 71% (106/150) of the singleton pregnancies. The interovulatory interval (IOI) was recorded on 78 occasions in seven of the mares in either non-pregnant cycles (n = 37) or those in which luteolysis followed embryo reduction (n = 41). The earliest time post-ovulation at which the embryo reduction resulted in luteostasis in an individual was 252 h (mid-Day 10). Consistency in luteostasis following embryo reduction showed individual variation between mares (272–344 h). Binary logistic regression analysis showed an individual mare effect (p < 0.001) and an effect of the interval post-ovulation at which embryo reduction was undertaken (p < 0.001). However, there was no significant effect of vesicle diameter at the time of embryo reduction (p = 0.099), nor a singleton or twin pregnancy (p = 0.993), on the dependent of luteolysis or luteostasis. The median IOI between individual mares varied significantly (p < 0.05) but was not correlated to the timing of MRP. The timing of MRP varied between the mares but was repeatable in each individual. The factors and mechanisms underlying the individuality in the timing of MRP were not determined and warrant further study. Full article
(This article belongs to the Special Issue Equine Fertility: Embryo-Maternal Communication and Embryo Loss in the Mare)
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