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1. The effect of embryo reduction and transfer on luteostasis in the mare

Author:
Sandra Wilsher; John R. Newcombe; Ann Ismer; Luis Duarte; Sofia Kovacsy; W.R. (Twink) Allen
Source:
Animal reproduction science 2022 v.242 pp. 107002
ISSN:
0378-4320
Subject:
ovulation,   etc   ; mares; pregnancy; uterus;     Show all 4 Subjects
Abstract:
... This study investigated the effects of embryo reduction and transfer of Day 11 embryos, with or without subsequent reduction, on luteostasis in the mare. In Experiment 1, reduction of embryos at Days 10 (n = 15), 11 (n = 47), 12 (n = 36), 13 (n = 27), 14 (n = 5) and 16 (n = 2) of pregnancy resulted in luteostasis in 13%, 47%, 78%, 89%, 80% and 100% mares. Mares undergoing > 1 embryo reduction show ...
DOI:
10.1016/j.anireprosci.2022.107002

2. YAP signaling in preovulatory granulosa cells is critical for the functioning of the EGF network during ovulation

Author:
Esdras Corrêa Dos Santos; Ariane Lalonde-Larue; Alfredo Quites Antoniazzi; Marcos Henrique Barreta; Christopher A. Price; Paulo Bayard Dias Gonçalves; Valério Marques Portela; Gustavo Zamberlam
Source:
Molecular and cellular endocrinology 2022 v.541 pp. 111524
ISSN:
0303-7207
Subject:
ovulation,   etc   ; cows; phosphorylation; transcription (genetics); ultrasonics;     Show all 5 Subjects
Abstract:
... Failure to ovulate is a major cause of infertility. The critical pathway that induces ovulation involves the EGF and MAPK phosphorylation, but studies in rodents have suggested that the Hippo activator, YAP, is also involved. It is unknown whether YAP-dependent transcriptional activity is important for the LH- or EGF-induced ovulatory cascade in monovulatory species such as the cow. Using a well-d ...
DOI:
10.1016/j.mce.2021.111524

3. Effect of Different Synchronization Regimens on Reproductive Variables of Crossbred (Swamp × Riverine) Nulliparous and Multiparous Buffaloes during Peak and Low Breeding Seasons

Author:
Adili Abulaiti; Zahid Naseer; Zulfiqar Ahmed; Dong Wang; Guohua Hua; Liguo Yang
Source:
Animals 2022 v.12 no.4 pp. -
ISSN:
2076-2615
Subject:
ovulation,   etc   ; crossbreds; estrus; pregnancy rate; riparian areas; swamps;     Show all 6 Subjects
Abstract:
... The present study was conducted to examine the effect of conventional the Ovsynch protocol (OVS) and a modified Ovsynch synchronization (GPGMH) protocol on the follicular dynamics, estrus, ovulation, and pregnancy in nulliparous and multiparous crossbred (swamp × riverine) buffaloes during different seasons. GPGMH or OVS protocols were used to synchronize nulliparous (n = 128; GPGMH = 94, OVS = 34 ...
DOI:
10.3390/ani12040415

4. Oocyte quality and in vivo embryo survival after ovarian stimulation in nulliparous and multiparous rabbit does

Author:
J.S. Vicente; F. Marco-Jiménez; M. Pérez-García; C. Naturil-Alfonso; D.S. Peñaranda; M.P. Viudes-de-Castro
Source:
Theriogenology 2022 v.189 pp. 53-58
ISSN:
0093-691X
Subject:
ovulation,   etc   ; embryogenesis; females; oocytes; rabbits; superovulation; transcriptome; viability;     Show all 8 Subjects
Abstract:
... Superovulation treatments aim to stimulate multifollicular recruitment, maximizing the number of oocytes or transferable embryos produced. Factors associated with the superovulation protocol, female characteristics and many other factors are determinants in the number and quality of oocytes obtained. An accurate way to assess oocyte quality more precise than morphological appearance is genetic exp ...
DOI:
10.1016/j.theriogenology.2022.06.003

5. Chicken ovarian follicles morphology and growth differentiation factor 9 gene expression in chicken ovarian follicles: review

Author:
V.R. Hlokoe; T.L. Tyasi; B. Gunya
Source:
Heliyon 2022 v.8 no.1 pp. e08742
ISSN:
2405-8440
Subject:
ovulation,   etc   ; chickens; egg production; follicular development; gene expression; genes;     Show all 6 Subjects
Abstract:
... Ovary follicular development is a progressive system from the beginning of small cortical follicles to the ovulation of hierarchical follicles. The review was conducted to provide information on the indigenous chickens commonly used for egg production, chicken ovarian follicles morphology and expression of growth differentiation factor 9 (GDF9) gene in ovarian follicles and its relationship with e ...
DOI:
10.1016/j.heliyon.2022.e08742

6. Effect of follicular ablation and gonadotropin priming on the recovery and quality of oocytes in Boran cows

Author:
Tilaye Demissie; Tefera Yilma; Tamrat Degefa; Gemechu Wirtu; Alemayehu Lemma
Source:
Tropical animal health and production 2022 v.54 no.5 pp. 280
ISSN:
0049-4747
Subject:
ovulation,   etc   ; Boran; animal health; corpus luteum; estrus; gonadotropins; oocytes;     Show all 7 Subjects
Abstract:
... The objective of the study was to evaluate the effect of follicle ablation, exogenous FSH application, and different coasting time prior to ovum pick-up (OPU) on the number of follicles suitable for aspiration, oocyte quality, and cleavage rate in Ethiopian Boran cows. The experiment was carried out in three parts, (I) cows were synchronized using 500 µg PGF2α given 11 days apart. Cows were then s ...
DOI:
10.1007/s11250-022-03302-8

7. Prediction of gestational age based on foetal ultrasonographic biometric measurements in light breed horses

Author:
Catherine D. Renaudin; Philip H. Kass; Jean‐Francois Bruyas
Source:
Reproduction in domestic animals 2022 v.57 no.7 pp. 743-753
ISSN:
0936-6768
Subject:
ovulation,   etc   ; biometry; eyes; femur; gestational age; prediction; pregnancy; ultrasonography;     Show all 8 Subjects
Abstract:
... A table was generated, based on foetal ultrasonographic measurements in light breed mares, for each day of gestation beginning with day 100, to provide the predicted value of four biometric parameters: biparietal diameter (BPD), eye approximated volume (EyV), foetal aortic diameter (AortD) and femur length (FL). Using this table, day of gestation was successfully predicted in 23 Quarter Horses (QH ...
DOI:
10.1111/rda.14116

8. Interactions between Nutrition and the “Ram Effect” in the Control of Ovarian Function in the Merino Ewe

Author:
P. Clemens Khaiseb; Penelope A. R. Hawken; Graeme B. Martin
Source:
Animals 2022 v.12 no.3 pp. -
ISSN:
2076-2615
Subject:
ovulation,   etc   ; Lupinus; Merino; dietary supplements; ewes; ram effect; rams;     Show all 7 Subjects
Abstract:
... We tested whether short-term nutritional supplementation (500 g lupin grain per head daily) would affect the response of ewes to the ram effect. Experiment 1 (end of non-breeding season): ewes were supplemented for either Days −6 to −1 relative to ram introduction (n = 24) or for 12 days after ram introduction (Days 11 to 22 of the ram-induced cycle; n = 29). Controls (n = 30) were not supplemente ...
DOI:
10.3390/ani12030362

9. The effects of different hormone administration methods on propagation successes in African catfish (Clarias gariepinus)

Author:
Balázs Kucska; Nguyen Ngoc Quyen; Tamás Szabó; Askale Gebremichael; Getachew Worku Alebachew; Bence Bógó; László Horváth; Balázs Csorbai; Béla Urbányi; Dariusz Kucharczyk; Szilvia Keszte; Tamás Müller
Source:
Aquaculture reports 2022 v.26 pp. 101311
ISSN:
2352-5134
Subject:
ovulation,   etc   ; Clarias gariepinus; aquaculture; catfish; catheters; mammals; metoclopramide; spermatozoa;     Show all 8 Subjects
Abstract:
... Successful propagation of fish depends on many factors including the optimal administration routes and delivery vehicles of spawning agents. In our experiments, the effects of different routes of administration and delivery vehicles of Ovopel (mammalian GnRH-analouge and metoclopramide) on ovulation were compared in African catfish (Clarias gariepinus). Seven females per treatment were used (BW = ...
DOI:
10.1016/j.aqrep.2022.101311

10. Emergence and selection of the dominant follicle and gonadotropin dynamics in postpartum lactating versus non-postpartum cycling mares

Author:
Marilia Pastorello; Melba O. Gastal; Daniel B. Godoi; Eduardo L. Gastal
Source:
Reproductive Biology 2022 v.22 no.2 pp. 100618
ISSN:
1642-431X
Subject:
ovulation,   etc   ; foals; heat; mares; ovarian follicles; parturition; periodicity; postpartum period;     Show all 8 Subjects
Abstract:
... Among female livestock, the mare has the shortest interval from parturition to first ovulation. Due to the scarcity of research on postpartum mares, little progress has been made on the characterization of the resumption of ovarian cyclicity after parturition. This study compared follicular and gonadotropin dynamics during follicle emergence and deviation in postpartum lactating (PP Lactating) ver ...
DOI:
10.1016/j.repbio.2022.100618

11. Occurrence of premature regression of corpus luteum in MOET programs in Dorper ewes under subtropical climate

Author:
Marcela S. Rocha; Ana Lucia R.S. Maia; Paulo Sérgio C. Rangel; Maria Emilia F. Oliveira; Jeferson F. Fonseca; Cláudio A. Oliveira; Joanna M.G. Souza-Fabjan
Source:
Livestock science 2022 v.255 pp. 104808
ISSN:
1871-1413
Subject:
ovulation,   etc   ; Dorper; body condition; corpus luteum; embryo transfer; subtropics; superovulation;     Show all 7 Subjects
Abstract:
... Premature regression of corpus luteum (PRCL) is a functional alteration that occurs mainly in superovulated females hampering the widespread use of multiple ovulation and embryo transfer (MOET). This study evaluated the association of donor age (3–9 years old), body condition score (2 to 4.5), number of MOET (1 to 5) repetitions and season (breeding, transition, or non-breeding) with the occurrenc ...
DOI:
10.1016/j.livsci.2021.104808

12. Comparison of two‐dimensional (2D) and three‐dimensional (3D) ultrasonography for gestational ageing in the early to mid‐pregnant bitch

Author:
Sabina Pestelacci; Nikolaos Tzanidakis; Iris Margaret Reichler; Orsolya Balogh
Source:
Reproduction in domestic animals 2022 v.57 no.3 pp. 235-245
ISSN:
0936-6768
Subject:
ovulation,   etc   ; bitches; blood serum; conceptus; parturition; prediction; pregnancy; progesterone; ultrasonography;     Show all 9 Subjects
Abstract:
... Accuracy of prediction of the day of parturition in the bitch decreases with advancing pregnancy. We hypothesized that three‐dimensional (3D) volume ultrasonography may be superior for gestational ageing than 2D measurements. Thirty‐two pregnancy examinations were performed in 25 bitches of different breeds 21–34 days after the first mating. Ovulation date from serum progesterone concentrations wa ...
DOI:
10.1111/rda.14045

13. In vivo embryo production in bovine donors with low and high antral follicle counts superovulated with low and high FSH doses

Author:
J.P.M. Lollato; A.C.C. Souza; R.C.P. Silva; M.O. Marques; A.S. Crozara; R.L. Gonçalves; L.S. Cunha; M.M. Seneda; F. Morotti
Source:
Livestock science 2022 v.262 pp. 104985
ISSN:
1871-1413
Subject:
ovulation,   etc   ; embryo transfer; models; ovarian follicles; reproductive performance; superovulation; zebu;     Show all 7 Subjects
Abstract:
... This study evaluated the embryo yield in Bos indicus donors with low and high antral follicle counts (AFCs) subjected to a multiple ovulation and embryo transfer (MOET) program using low and high FSH doses for superovulation. Donors (n = 16) underwent a presynchronization E2/P4-based protocol 30 days (D-30) before starting the MOET program. After AFC evaluation (D-26), donors with low (n = 8; ≤ 15 ...
DOI:
10.1016/j.livsci.2022.104985

14. Follicular Dynamics and Pregnancy Rate in Nellore Heifers Submitted to Fixed-Time Artificial Insemination Protocols (FTAI)

Author:
Filipe Prudente da Silva; Kedson Alessandri Lobo Neves; Francisco R. A. Correa; Lílian K. X. Silva; Helder R. Batista; Welligton C. da Silva; Nohora Mercado Caruso; Antonio Humberto Hamad Minervino
Source:
Veterinary sciences 2022 v.9 no.8 pp. -
ISSN:
2306-7381
Subject:
ovulation,   etc   ; Nellore; artificial insemination; conception; equine chorionic gonadotropin; pregnancy rate; ultrasonics;     Show all 7 Subjects
Abstract:
... This study aimed to evaluate follicular dynamics and pregnancy rates in Nellore heifers submitted to fixed-time artificial insemination (FTAI) protocols associated with equine chorionic gonadotrophin (eCG) or follicle stimulating hormone (FSH). Nellore heifers (n = 259) were used, divided into two studies. Experiment I evaluated the ovarian follicular dynamics in 64 Nellore heifers submitted to di ...
DOI:
10.3390/vetsci9080377

15. Local embryo-mediated changes in endometrial gene expression during embryo mobility in mares

Author:
T. Castro; J.C. Jacob; R.R. Domingues; O.J. Ginther
Source:
Theriogenology 2022 v.182 pp. 78-84
ISSN:
0093-691X
Subject:
ovulation,   etc   ; endometrium; estrogens; gene expression; genes; luteolysis; prostaglandin-E synthase; prostaglandins;     Show all 8 Subjects
Abstract:
... Prostaglandin E2 (PGE2) and prostaglandin F2α (PGF2α) are involved in equine embryo mobility throughout the uterus on Days 11–15 (ovulation = Day 0). On a day (Day 12) of maximal embryo mobility in pregnant mares (n = 13) and before luteolysis in nonbred mares (n = 10), gene expressions were compared between the uterine horns that did and did not contain the mobile embryo and between pregnant and ...
DOI:
10.1016/j.theriogenology.2022.01.032

16. Resumption of ovarian activity following removal of a 4.7 mg deslorelin implant in queens

Author:
L. Ferré‐Dolcet; S. Ferro; B. Contiero; F. Andretta; A. Cattai; C. Fontaine; S. Romagnoli
Source:
Reproduction in domestic animals 2022 v.57 no.1 pp. 3-9
ISSN:
0936-6768
Subject:
ovulation,   etc   ; adults; blood sampling; deslorelin acetate; estrogens; estrus; follicular development; ultrasonography;     Show all 8 Subjects
Abstract:
... Deslorelin implants are widely used in felines. Due to their prolonged duration cat breeders frequently request early implant removal. The interval between deslorelin implant removal and resumption of ovarian function in queens is unknown. The aim of this study was to evaluate the interval between the removal of a deslorelin implant and the resumption of ovarian activity in adult queens. Twenty‐th ...
DOI:
10.1111/rda.14023

17. Time of ovulation in sows is not related to intravaginal dissolved oxygen levels or temperature

Author:
Britta Hensel; Rudolf Großfeld; Christian Simmet; Markus Jung; Martin Schulze
Source:
Livestock science 2022 v.260 pp. 104926
ISSN:
1871-1413
Subject:
ovulation,   etc   ; artificial insemination; dissolved oxygen; estrus; heat; oxygen; prediction; temperature; ultrasonics;     Show all 9 Subjects
Abstract:
... Timing is a crucial factor in the success of artificial insemination (AI). In sows, the appropriate time for AI amounts 12 hours before to 4 hours after ovulation based on the period in which viable spermatozoa should be available at the site of fertilization. However, in contrast to the general period of estrus, which is associated with behavioral and physical changes, the exact time of ovulation ...
DOI:
10.1016/j.livsci.2022.104926

18. An altered expression of components of the IGF system could contribute to follicular persistence in Holstein cows

Author:
Fernanda Mariel Rodríguez; María Lucía Cattaneo Moreyra; Emilia Huber; Natalia Carolina Gareis; Lucas Etchevers; Hugo Héctor Ortega; Natalia Raquel Salvetti; Florencia Rey
Source:
Research in veterinary science 2022 v.143 pp. 99-106
ISSN:
0034-5288
Subject:
ovulation,   etc   ; Holstein; blood serum; milk production; pathogenesis; research; somatomedins; veterinary medicine;     Show all 8 Subjects
Abstract:
... In dairy cows, reproductive diseases such as cystic ovarian disease (COD) represent a major problem that impacts on dairy production. It has been postulated that the insulin-like growth factor (IGF) system may contribute to follicular persistence and development of COD. Thus, the aim of the present study was to analyze relevant members of the IGF system in a critical period immediately after the e ...
DOI:
10.1016/j.rvsc.2021.12.021

19. Embryo biotechnologies in sheep: Achievements and new improvements

Author:
Laura Falchi; Sergio Ledda; Maria T. Zedda
Source:
Reproduction in domestic animals 2022 v.57 Suppl S5 pp. 22-33
ISSN:
0936-6768
Subject:
ovulation,   etc   ; embryo transfer; genes; genetic improvement; juveniles; molecular biology; oocytes; sheep;     Show all 8 Subjects
Abstract:
... To date, large‐scale use of multiple ovulation and embryo transfer (MOET) programmes in ovine species is limited due to unpredictable results and high costs of hormonal stimulation and treatment. Therefore, even if considered reliable, they are not fully applicable in large‐scale systems. More recently, the new prospects offered by in vitro embryo production (IVEP) through collection of oocytes po ...
DOI:
10.1111/rda.14127

20. Normal feline reproduction: The queen

Author:
Aime K Johnson
Source:
Journal of feline medicine and surgery 2022 v.24 no.3 pp. 204-211
ISSN:
1532-2750
Subject:
ovulation,   etc   ; cats; diestrus; estrus; females; lighting; medicine; periodicity; photoperiod; proestrus; surgery;     Show all 11 Subjects
Abstract:
... Cats are seasonally polyestrous, meaning they exhibit multiple estrous cycles within a season, followed by a period of non-cyclicity. Cats cycle when the day length is long but can be induced to cycle year-round with 14 h of continuous artificial lighting. The feline estrous cycle includes the following stages: proestrus, estrus, interestrus and, if ovulation occurs, diestrus. Cats are induced ovu ...
DOI:
10.1177/1098612X221079706