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23
datasets available to search
ShareScore release 0.9.0
Dataset results
23 results for “hormone transfer”
Dataset of maternal thyroid hormones transfer in Pied flycatchers
<p>This is the dataset of an experiment conducted on Pied flycatchers (<em>Ficedula hypoleuca</em>) in which we manipulated thyroid hormones in the mother's circulation. This dataset contains all the responses measured in this experiment.</p>
Maternally-transferred thyroid hormones and life-history variation in birds
<p><span>1. In vertebrates, thyroid hormones (THs) play an important role in the regulation of growth, development, metabolism, photoperiodic responses and migration. Maternally transferred THs are important for normal early-phase embryonic development when embryos are not able to produce endogenous THs. Previous studies have shown that variation in maternal THs within the physiological range can influence offspring phenotype.</span></p> <p><span>2. Given the essential functions of maternal THs in development and metabolism, THs may be a mediator of life-history variation across species. </span></p> <p><span>3. We tested the hypothesis that differences in life histories are associated with differences in maternal TH transfer across species. Using birds as a model, we specifically tested whether maternally transferred yolk THs co-vary with migratory status, developmental mode, and traits related to pace-of-life (e.g. basal metabolic rate, maximum lifespan).</span></p> <p><span>4. We collected un-incubated eggs (n = 1-21 eggs per species, median = 7) from 34 wild and captive bird species across 17 families and 6 orders to measure yolk THs (both triiodothyronine, T3 and thyroxine, T4), compiled life-history trait data from the literature, and used Bayesian phylogenetic mixed models to test our hypotheses.</span></p> <p><span>5. Our models indicated that both concentrations and total amounts of the two main forms of THs (T3 and T4) were higher in the eggs of migratory species compared to resident species, and total amounts were higher in the eggs of precocial species, which have longer prenatal developmental periods, than in those of altricial species. However, maternal yolk THs did not show clear associations with pace-of-life related traits, such as fecundity, basal metabolic rate, or maximum lifespan.</span></p> <p><span>6. We quantified interspecific variation in maternal yolk THs in birds and our findings suggest higher maternal TH transfer is associated with the precocial mode of development and migratory status. Whether maternal THs represent a part of the mechanism underlying the evolution of precocial development and migration or a consequence of such life histories is currently unclear. We therefore encourage further studies to explore the physiological mechanisms and evolutionary processes underlying these patterns.</span></p>
Live Birth After Letrozole-stimulated Cycles Versus Hormone Replacement Treatment Cycles for the First Frozen Embryo Transfer in Women With PCOS
ClinicalTrials.gov study NCT05227391. IPD Sharing: YES. Countries: 1. Publications: 1.
MENOPUR® in a Gonadotropin-Releasing Hormone (GnRH) Antagonist Cycle With Single-Blastocyst Transfer in a High Responder Subject Population
ClinicalTrials.gov study NCT02554279. IPD Sharing: Not stated. Countries: 1. Publications: 3.
MENOPUR in Gonadotrophin-releasing Hormone (GnRH) Antagonist Cycles With Single Embryo Transfer
ClinicalTrials.gov study NCT00884221. IPD Sharing: Not stated. Countries: 7. Publications: 2.
Assessment of the Transfer of Using Levonorgestrel Intrauterine System (LNG IUS) as a Contraceptive to Using it as Part of Hormone Replacement Therapy (HRT).
ClinicalTrials.gov study NCT00185458. IPD Sharing: Not stated. Countries: 4. Publications: 1.
Maternally-transferred thyroid hormones and life-history variation in birds
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What is the Best Preparation for Embryo Transfer in Cryo Cycles: a Natural Cycle or Light Hormonal Stimulation?
ClinicalTrials.gov study NCT00492934. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effect of Shorten Gonadotropin-releasing Hormone Agonist Therapy on the Outcome of in Vitro Fertilization-Embryo Transfer in Patients With Endometriosis
ClinicalTrials.gov study NCT03006406. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
Hormonal Monitoring and Progesterone Adjustment in Frozen Embryo Transfer Cycles
ClinicalTrials.gov study NCT05189145. IPD Sharing: Not stated. Countries: 1. Publications: 7.
Frozen Embryo Transfer in Natural and Hormonal Replacement Cycles
ClinicalTrials.gov study NCT02251925. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Down-regulated Hormonally Controlled Cycles for Vitrification-warmed Blastocyst Transfers
ClinicalTrials.gov study NCT02238431. IPD Sharing: Not stated. Countries: 1. Publications: 3.
The Rescue of Hormonal Replacement Frozen Embryo Transfer Cycle With Low Serum Progesterone.
ClinicalTrials.gov study NCT05758064. IPD Sharing: UNDECIDED. Countries: 1. Publications: 9.
Natural Cycle Versus Hormone Replacement Therapy Cycle for a Frozen-thawed Embryo Transfer in PGT Patients
ClinicalTrials.gov study NCT03976544. IPD Sharing: NO. Countries: 1. Publications: 0.
Injection of Hormone to Enhance Implantation in Embryo Transfer After IVF
ClinicalTrials.gov study NCT01986374. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Early Preparation With Gonadotropin- Releasing Hormon (GnRh) Agonists Injection With Frozen-Thawed Embryo Transfer?
ClinicalTrials.gov study NCT03353883. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Data from: Experimental evidence for genetic heritability of maternal hormone transfer to offspring
In many animal species, embryos are exposed to maternal hormones that affect their development. Maternal hormone transfer varies with environmental conditions of the mother and is often interpreted as being shaped by natural selection to adjust the offspring to prevailing environmental conditions. Such hormone transfer requires genetic variability which has not yet been experimentally demonstrated. Our study reports direct evidence for additive genetic variance of maternal androgens through a bi-directional selection on yolk testosterone (T) levels in Japanese quail. Lines selected for high (HET) and low (LET) egg T concentration differed in yolk levels of this androgen resulting in high realised heritability (h2 = 0.42). Correlated responses to selection on other gonadal hormones indicate that selection specifically targeted biological active androgens. Eggs of HET quail contained higher androstenedione and lower estradiol concentrations than those of LET quail, with no line differences in yolk progesterone. Plasma T concentrations of adult females were not affected by selection, seriously challenging the hypothesis that transfer of maternal hormones to offspring is constrained by hormone levels in a mother's circulation. Our results suggest that transfer of maternal T represents an indirect genetic effect with important consequences for the evolution of traits in offspring.
Data from: Experimental evidence for genetic heritability of maternal hormone transfer to offspring
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Correlation of Urinary and Serum Hormone Levels in Natural Cycle Frozen Embryo Transfer Cycles
ClinicalTrials.gov study NCT06410170. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Frozen-thawed Embryo Transfers and Hormone Substitution on Thrombotic Risk Markers
ClinicalTrials.gov study NCT04359576. IPD Sharing: NO. Countries: 1. Publications: 0.
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International Brain Laboratory public data
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OpenNeuro
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