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1. Intraovarianism and differences in ovulation frequency between left and right ovaries in Bos taurus heifers

Author:
Ginther, O.J.; Gomez-León, Victor E.
Source:
Reproductive Biology 2020 v.20 no.3 pp. 333-337
ISSN:
1642-431X
Subject:
ovulation,   etc   ; animal ovaries; heifers;     Show all 3 Subjects
Abstract:
... Sides of ovulation at beginning and end of an interovulatory interval (IOI) were studied for 10 successive ovulations in each of 100 heifers (1000 ovulations, 900 IOI). The frequency of side for 1000 ovulations was less (P < 0.0002) for the left ovary (LO or L; 44.4 %) than for the right ovary (RO or R; 55.6 %). Number of observed ratios of L to R was determined within each of 100 sets of 10 ovula ...
DOI:
10.1016/j.repbio.2020.05.006

2. Impaired oocyte maturation and ovulation in membrane progestin receptor (mPR) knockouts in zebrafish

Author:
Wu, Xin-Jun; Liu, Dong-Teng; Chen, Shixi; Hong, Wanshu; Zhu, Yong
Source:
Molecular and cellular endocrinology 2020 v.511 pp. 110856
ISSN:
0303-7207
Subject:
ovulation,   etc   ; Danio rerio; eggs; females; oocytes;     Show all 5 Subjects
Abstract:
... Accumulating evidence suggest that membrane progestin receptor α (mPRα) is the membrane receptor mediating nongenomic progestin signaling that induces oocyte maturation in teleost. However, the involvement of other members of mPR family in oocyte maturation is still unclear. In this study, we found impaired oocyte maturation in zebrafish lacking mPRα1, mPRα2, mPRβ, or mPRγ2. In contrast, no differ ...
DOI:
10.1016/j.mce.2020.110856

3. Long interval prostaglandin-based treatment regimens do not affect ovulatory or prolificacy rates of multiparous ewes after cervical fixed timed AI

Author:
Olivera-Muzante, J.; Fierro, S.; Minteguiaga, M.A.
Source:
Animal reproduction science 2020 v.218 pp. 106482
ISSN:
0378-4320
Subject:
ovulation,   etc   ; conception; estrus; ewes; fecundity; prostaglandins;     Show all 6 Subjects
Abstract:
... To evaluate effects of a longer, than conventional, interval between time of prostaglandin F₂α (PG)-based administrations in a PG-based treatment regimen for fixed timed AI (FTAI) on ovulation rate (OR), non-estrous return rate on Day 21 subsequent to the time of AI (NRR21), as well as conception, prolificacy and fecundity rates, ewes were assigned to two groups. Ewes of treatment group (PG15) wer ...
DOI:
10.1016/j.anireprosci.2020.106482

4. Effect of progesterone administration during growing phase of first dominant follicle on follicular wave pattern in buffalo heifers

Author:
Jan, M. H.; Kumar, H.; Kumar, S.; Sharma, R. K.; Gupta, A.; Mehrara, K. L.
Source:
Tropical animal health and production 2020 v.52 no.3 pp. 1395-1402
ISSN:
0049-4747
Subject:
ovulation,   etc   ; buffaloes; heifers; ovarian follicles; progesterone;     Show all 5 Subjects
Abstract:
... In buffaloes, like other domestic mammals, antral follicles develop in a wave-like pattern. Factors predictive of a particular follicular wave pattern are yet to be identified. In this study, we examined the preponderance of 2- versus 3-wave patterns in 46 interovulatory intervals (IOIs) from 36 buffalo heifers, in which a subset of 10 heifers was scanned for 2 consecutive IOIs to record the repea ...
DOI:
10.1007/s11250-019-02143-2

5. Evaluation of ovarian volume by transrectal ultrasonography in cattle; affect of the day of the estrous cycle and validation of a method of subtracting of corpora lutea and follicle volume

Author:
Crane, M. Bronwyn; Muirhead, Tammy L.
Source:
Animal reproduction science 2020 v.214 pp. 106302
ISSN:
0378-4320
Subject:
ovulation,   etc   ; corpus luteum; cows; estrous cycle; ultrasonography;     Show all 5 Subjects
Abstract:
... This research was conducted to evaluate a method for determining ovarian volume using ultrasonography; specifically, how the day of the estrous cycle affected ovarian volume, and the application of a formula for adjusted ovarian volume (ADJ VOL) and its relationship to actual ovarian volume. Cows (n = 22) were estrous synchronized and subjected to serial transrectal ultrasonographic evaluations, p ...
DOI:
10.1016/j.anireprosci.2020.106302

6. Effect of number of 6-mm predeviation follicles and intraovarian patterns on right-side ovulation in heifers

Author:
Ginther, O.J.; Dangudubiyyam, S.V.
Source:
Animal reproduction science 2019
ISSN:
0378-4320
Subject:
ovulation,   etc   ; heifers; ovarian follicles;     Show all 3 Subjects
Abstract:
... The mechanisms underlying the greater frequency of ovulation from right ovary (RO) than left ovary (LO) were studied in 145 Bos taurus heifers. Diameter deviation during a follicular wave is indicated by continued diameter increase in the future preovulatory follicle (PF) and a decrease in diameter of future subordinate follicles. The PF (ovulation) was in the RO (63/105, 60%) more frequently (P < ...
DOI:
10.1016/j.anireprosci.2019.01.011

7. Superovulation of dromedary camels with eCG: An effective and practical technique

Author:
Manjunatha, B.M.; Al-Hosni, Ali; Al-Bulushi, Samir
Source:
Theriogenology 2020 v.151 pp. 112-118
ISSN:
0093-691X
Subject:
ovulation,   etc   ; Camelus dromedarius; animal ovaries; camels; equine chorionic gonadotropin; follicle-stimulating hormone; pregnancy rate; superovulation;     Show all 8 Subjects
Abstract:
... This study was conducted to develop simple superovulation protocols for dromedary camels using eCG. In experiment 1, camels received either 1000, 2000, 3000, 4000, 5000 or 6000 IU eCG. In experiment 2, camels received either 400 mg FSH (Folltropin-V) twice-daily over 5 days or 3000 IU eCG. In experiment 3, camels received 3000 IU eCG either at 2, 3, 4 or 5 days after ovulation induction. Ovarian r ...
DOI:
10.1016/j.theriogenology.2020.04.017

8. Effect of Chronic Administration of Oxytocin on Corpus Luteum Function in Cycling Mares

Author:
Parkinson, Kate C.; Vanderwall, Dirk K.; Rigas, Johanna; Sweat, Alexis
Source:
Journal of equine veterinary science 2020 v.90 pp. 102991
ISSN:
0737-0806
Subject:
ovulation,   etc   ; blood sampling; blood serum; corpus luteum; estrous cycle; intramuscular injection; luteolysis; mares; monitoring; oxytocin; progesterone;     Show all 11 Subjects
Abstract:
... The objective of this study was to determine if intramuscular administration of 60 units of oxytocin once daily for 29 days, regardless of when treatment was initiated during the estrous cycle (i.e., without monitoring estrous behavior and/or detecting ovulation), would induce prolonged corpus luteum (CL) function in cycling mares. Mares were randomly assigned to two groups: (1) saline-treated con ...
DOI:
10.1016/j.jevs.2020.102991

9. Effects of Hysteroscopic and Uterine Body Insemination on the Presence of Selected Immune Cells in the Equine Endometrium

Author:
Köhne, Martin; Mönnig, Franziska; Papin, Johanna; Schöniger, Sandra; Tönissen, Anna; Rohn, Karl; Martinsson, Gunilla; Schoon, Heinz-Adolf; Sieme, Harald
Source:
Journal of equine veterinary science 2020 v.90 pp. 103023
ISSN:
0737-0806
Subject:
ovulation,   etc   ; T-lymphocytes; biopsy; cell-mediated immunity; endometrium; immunohistochemistry; insemination; macrophages; mares; microbial contamination; neutrophils; spermatozoa;     Show all 12 Subjects
Abstract:
... The effects of standard uterine body and hysteroscopic insemination on endometrial health were investigated. For this purpose, 33 mares were assigned to five different protocols: control (no insemination; n = 7), sham AI (sham uterine body insemination; n = 6), sham HysAI (sham hysteroscopic insemination; n = 7), standard AI (standard uterine body insemination, 300 × 10⁶ progressively motile sperm ...
DOI:
10.1016/j.jevs.2020.103023

10. Sudden Death by Ovarian Hemorrhage and Hemoperitoneum in a Pregnant Miniature Mare

Author:
Camacho-Rozo, Cesar Augusto; Santos, Gabriel de Oliveira; Wenzen, Dominique de Paula; Cousseau, Sabrina Bellaver; Wronski, Julia Gabriela; Argenta, Fernando F.; Winter, Gustavo Henrique Zimmermann; Pavarini, Saulo Petinatti; Mattos, Rodrigo Costa
Source:
Journal of equine veterinary science 2020 v.90 pp. 102996
ISSN:
0737-0806
Subject:
ovulation,   etc   ; Miniature (horse breed); animal ovaries; body condition; hemorrhage; laminitis; luteinization; mares; necropsy; obesity;     Show all 10 Subjects
Abstract:
... This report describes a case of sudden death of a pregnant miniature mare due to an acute ovarian hemorrhage leading to fatal hemoperitoneum. The miniature horse was a 12-year-old female, 60 days pregnant, with a body condition score of 7 (1–9), with a history of obesity and laminitis. Necropsy revealed hemoperitoneum due to an ovarian capsule rupture and hemorrhage after a physiological supplemen ...
DOI:
10.1016/j.jevs.2020.102996

11. Association of fertility with group mating behavior in ewes

Author:
Juengel, Jennifer L.; Quirke, Laurel D.; Hyslop, Kieran; Meenken, Esther D.; Peers-Adams, Jacqui; Smith, Peter; Edwards, Sara J.
Source:
Animal reproduction science 2020 v.216 pp. 106359
ISSN:
0378-4320
Subject:
ovulation,   etc   ; adults; breeding; estradiol; estrus; ewes; fetus; lambs; management systems; mating behavior; pregnancy; rams;     Show all 12 Subjects
Abstract:
... It was hypothesized that values for fertility variables would vary with number of rams ewes mated with in a group mating management system. In Experiment 1, for adult ewes (n = 872) joined with rams for 35–38 days, 19.0 ± 2.2 %, 19.2 ± 3.5 %, 34.4 ± 1.3 % and 27.4 ± 3.3 % were marked by zero, one, two or three rams during the first 17 days, respectively. In general, as number of rams with which ew ...
DOI:
10.1016/j.anireprosci.2020.106359

12. Timing of oocyte recruitment within the ovulatory cycle of Macedonian shad, Alosa macedonica, a batch spawning fish with indeterminate fecundity

Author:
Mouchlianitis, Foivos Alexandros; Minos, George; Ganias, Kostas
Source:
Theriogenology 2020 v.146 pp. 31-38
ISSN:
0093-691X
Subject:
ovulation,   etc   ; Alosa; animal ovaries; fecundity; gonadosomatic index; oocytes; periodicity; shad; spawning;     Show all 9 Subjects
Abstract:
... The recruitment of primary growth (PG) oocytes to the secondary growth (SG) phase within the ovulatory cycle, i.e. time interval between two sequential ovulation/spawning events, has rarely been examined in detail in a quantitative manner for batch spawning fishes with indeterminate fecundity. In the present study we analyzed the ovarian dynamics of Macedonian shad, Alosa macedonica, an iteroparou ...
DOI:
10.1016/j.theriogenology.2020.01.050

13. Preovulatory follicular dynamics, ovulatory response and embryo yield in Lacaune ewes subjected to synchronous estrus induction protocols and non-surgical embryo recovery

Author:
Figueira, Lucas Machado; Alves, Nadja Gomes; Souza-Fabjan, Joanna Maria Gonçalves; Oliveira, Maria Emilia Franco; Lima, Renato Ribeiro; Souza, Guilherme Nunes; Fonseca, Jeferson Ferreira
Source:
Theriogenology 2020 v.145 pp. 238-246
ISSN:
0093-691X
Subject:
ovulation,   etc   ; acetates; controlled internal drug release devices; equine chorionic gonadotropin; estrus; ewes; medroxyprogesterone; ultrasonography;     Show all 8 Subjects
Abstract:
... The objective of this study was to assess the effect of the duration of progesterone-based estrus induction protocols on preovulatory follicular dynamics, ovulatory response, and embryo yield after non-surgical embryo recovery (NSER) in Lacaune ewes. Females received acetate medroxyprogesterone intravaginal sponges for six (G-6; n = 14) or nine (G-9; n = 14) days plus d-cloprostenol and eCG 24 h b ...
DOI:
10.1016/j.theriogenology.2019.11.004

14. Propagation of jundia Rhamdia quelen (Siluriformes: Heptapteridae) by applying the ovarian sperm injection method

Author:
Ittzés, István; Kronbauer, Ernani Carlos; Szabó, Tamás; Horváth, László; Urbányi, Béla; Müller, Tamás
Source:
Aquaculture reports 2020 v.16 pp. 100275
ISSN:
2352-5134
Subject:
ovulation,   etc   ; Cyprinus carpio; Rhamdia quelen; animal ovaries; body weight; catheters; eggs; females; males; spermatozoa;     Show all 10 Subjects
Abstract:
... We compared the effectiveness of the ovarian sperm injection method with that of the traditional one over the artificial propagation of jundia. Three experimental groups were set up containing seven females each. Females in Group 1 received common carp pituitary extract (CPE) homogenized in saline to induce ovulation and the stripped eggs were fertilized with the traditional dry method. In Group 2 ...
DOI:
10.1016/j.aqrep.2020.100275

15. The effect of GnRH on the pregnancy ratio in low-yielding local race cows: comparison of different injection times

Author:
Uslu, Barış Atalay; Kocyigit, Alper; Sendag, Sait; Gülyüz, Fetih; Wehrend, Axel
Source:
Tropical animal health and production 2020 v.52 no.2 pp. 497-502
ISSN:
0049-4747
Subject:
ovulation,   etc   ; artificial insemination; dairy cows; estrus; gonadotropin-releasing hormone; luteolysis; ovarian follicles; pregnancy rate; prostaglandins; races;     Show all 10 Subjects
Abstract:
... The objective of this article was to investigate the efficiency of GnRH administrations at different time points after induced luteolysis on pregnancy rates in low-yielding subfertile cows. One thousand six hundred and ten healthy and subfertile dairy cows of different ages and races were used in this study. Cows were randomly divided into 4 groups. Estrus cycles were synchronized by two, with 11- ...
DOI:
10.1007/s11250-019-02034-6

16. Reproductive cycle and sperm storage of female coral snakes, Micrurus corallinus and Micrurus frontalis

Author:
Bassi, Erick Augusto; Coeti, Rafaela Zani; de Almeida-Santos, Selma Maria
ISSN:
0173-5373
Subject:
ovulation,   etc   ; Micrurus; autumn; carbohydrates; females; secretion; spermatozoa; spring; storage time; summer; uterus; vitellogenesis; winter;     Show all 13 Subjects
Abstract:
... We analyzed the hypothesis that the lack of synchronization between the mating and ovulation period of Micrurus frontalis (BRT clade) is indicative of the capacity of females to store sperm. Conversely, since these reproductive events occur in the same season for Micrurus corallinus (BRM clade), sperm storage is not expected. Thus, we analyzed the reproductive cycle of female M. corallinus and M. ...
DOI:
10.1163/15685381-20191189

17. A rapid and efficient method for the collection of highly developmental murine immature oocytes using cilostazol, a phosphodiesterase 3A inhibitor

Author:
Taiyeb, Ahmed M.; Alazzam, Anas; Kjelland, Michael E.; Adams, Thaddeus H.; Kraemer, Duane C.; Muhsen-Alanssari, Saeeda A.; Ridha-Albarzanchi, Mundhir T.
Source:
Life sciences 2020 v.241 pp. 117100
ISSN:
0024-3205
Subject:
ovulation,   etc   ; chromatin; cortical granules; germinal vesicle; labor; metaphase; oral administration; superovulation;     Show all 8 Subjects
Abstract:
... The present study aims to define maturation, yield, health, and ease of collection of murine immature oocytes recovered using the conventional method or from mice treated with cilostazol.The conventional method included the superovulation of mice and the recovery of germinal vesicle (GV) or metaphase (MI) oocytes from preovulatory follicles. The cilostazol method included the oral treatment of sup ...
DOI:
10.1016/j.lfs.2019.117100

18. Triplex doppler ultrasonography to describe the uterine arteries during diestrus and progesterone profile in pregnant and non-pregnant bitches of different sizes

Author:
Roos, J.; Aubanel, C.; Niewiadomska, Z.; Lannelongue, L.; Maenhoudt, C.; Fontbonne, A.
Source:
Theriogenology 2020 v.141 pp. 153-160
ISSN:
0093-691X
Subject:
ovulation,   etc   ; arteries; bitches; breeds; diestrus; fetal development; fetus; hemodynamics; medicine; pregnancy; progesterone; resorption; ultrasonography;     Show all 13 Subjects
Abstract:
... Hemodynamics of uterine vascularization is modified throughout pregnancy to meet the increasing demand of the growing fetuses and triplex doppler ultrasonography is widely used in human medicine to study the uterine arteries and assess the fetal and placental conditions. The aim of our study was to confirm this observation in the bitch, to evaluate differences between bitches of different sizes an ...
DOI:
10.1016/j.theriogenology.2019.08.035

19. Relationship between abundance and localization of maternal messenger RNA and egg quality in artificially matured Japanese eel Anguilla japonica

Author:
Horiuchi, Moemi; Izumi, Hikari; Lokman, P. Mark; Ijiri, Shigeho; Adachi, Shinji
Source:
Fisheries science 2020 v.86 no.1 pp. 43-56
ISSN:
0919-9268
Subject:
ovulation,   etc   ; Anguilla japonica; cortex; egg quality; eggs; genes; hatching; messenger RNA; migratory behavior; oocytes;     Show all 10 Subjects
Abstract:
... Artificial maturation and ovulation of Japanese eel do not always result in the production of good-quality eggs. The molecular basis for compromised egg quality in artificially matured Japanese eel remains unknown. In this study, we investigated the relationship between the localization of six maternal transcripts, grip2, dazl, sybu, trim36, pou5f3 and npm2, and egg quality in artificially matured ...
DOI:
10.1007/s12562-019-01377-1

20. Sexual dichromatism and dimorphism in the goatfish Parupeneus spilurus (Perciformes: Mullidae) in southern Japan

Author:
Bandai, Ayumi; Matsubara, Takahiro; Goto, Rie; Hayakawa, Taketo; Iwatsuki, Yukio; Motomura, Hiroyuki
Source:
Ichthyological research 2020 v.67 no.1 pp. 203-211
ISSN:
1341-8998
Subject:
ovulation,   etc   ; Parupeneus; breeding; color; dimorphism; females; gonads; males; ovarian development; spawning; Japan;     Show all 11 Subjects
Abstract:
... Examination of gonads, fresh coloration and external morphology of Parupeneus spilurus (Perciformes: Mullidae), based on 55 males [115.4–315.9 mm SL (mean 254.1 mm)] and 22 females [116.2–299.5 mm SL (225.3 mm)], provided evidence of both sexual dichromatism and dimorphism. Males consistently had six to nine oblique yellow stripes and two yellow stripes on the second dorsal fin and anal fin, respe ...
DOI:
10.1007/s10228-019-00707-8