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39 results for “fertilization success”
Data from: Cryptic female choice enhances fertilization success and embryo survival in chinook salmon
In this study we investigated two potentially important intersexual postcopulatory gametic interactions in a population of chinook salmon (Oncorhynchus tshawytscha): (i) the effect of female ovarian fluid (OF) on the behaviour of spermatozoa during fertilisation, and (ii) the effects of multilocus heterozygosity (as an index of male quality) and female-male genetic relatedness on sperm behaviour and male fertilisation success when there is sperm competition in the presence of that ovarian fluid. To do this, we conducted a series of in vitro competitive fertilisation experiments and found that,when ejaculates from two males are competing for access to a single female's unfertilised eggs, fertilisation success was significantly biased toward the male whose sperm swam fastest in the female's ovarian fluid. Embryo survival—a measure of fitness—was also positively correlated with both sperm swimming speed in ovarian fluid and male multilocus heterozygosity, providing novel evidence that cryptic female choice is adaptive for the female, enhancing the early survival of her offspring and potentially influencing her fitness.
Data from: A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success
A complete understanding of male reproductive success, and thus sexual selection, often requires an insight into male success in sperm competition. Genuine conclusions on male sperm competitiveness can only be made in real competitive situations. However, statistical analyses of sperm competitiveness from fertilization success data have been shown to be problematic. Here, I first outline a comprehensive general description of the different additive and non-additive elements relevant for the outcome of sperm competition staged between two males. Based on this description, I will highlight two main problems that are frequently encountered in experiments aiming at estimating sperm competitiveness. First, I focus on potential problems when using standardized competitors vs. random mating trials, because trials with standardized competitors do not allow generalization if male-male interactions are important. Second, I illustrate the necessity to analyse data on the logit scale rather than on raw proportions, because only the logit scale allows a clean separation of additive and non-additive effects (i.e. male×male- and female×male interactions).
Data from: Copulation order, density cues and variance in fertilization success in a cestode
Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50-50 null expectation, sometimes considerably, implying there was a 'winner' in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment.
Data from: The genetics of egg retention and fertilization success in Drosophila: one step closer to understanding the transition from facultative to obligate viviparity
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Data from: Cryptic female choice enhances fertilization success and embryo survival in chinook salmon
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Data from: Paternity analysis of wild-caught females shows that sperm package size and placement influence fertilization success in the bushcricket Pholidoptera griseoaptera
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Data from: Postnatal depression and reproductive success in modern, low-fertility contexts
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Data from: A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success
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Data from: Copulation order, density cues and variance in fertilization success in a cestode
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Data from: Male investments in high quality sperm improve fertilization success, but may have negative impact on offspring fitness in whitefish
Many ejaculate traits show remarkable variation in relation to male social status. Males in disfavoured (subordinate) mating positions often invest heavily on sperm motility but may have less available resources on traits (e.g., secondary sexual ornaments) that improve the probability of gaining matings. Although higher investments in sperm motility can increase the relative fertilization success of subordinate males, it is unclear whether status-dependent differences in sperm traits could have any consequences for offspring fitness. We tested this possibility in whitefish (Coregonus lavaretus L.) by experimentally fertilizing the eggs of 24 females with the sperm of either highly-ornamented (large breeding tubercles, dominant) or less-ornamented (small tubercles, subordinate) males (split-clutch breeding design). In comparison to highly-ornamented individuals, less-ornamented males had higher sperm motility, which fertilized the eggs more efficiently, but produced embryos with impaired hatching success. Also offspring size and body condition were lower among less-ornamented males. Furthermore, sperm motility was positively associated with the fertilization success and offspring size, but only in highly-ornamented males. Together our results indicate that male investments on highly motile (fertile) sperm is not necessarily advantageous during later offspring ontogeny and that male status-dependent differences in sperm phenotype may have important effects on offspring fitness in different life-history stages.
Pregnancy Success Rates of Acupuncture for in Vitro Fertilization
ClinicalTrials.gov study NCT03572608. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Impact of PH Values of the Embryo Culture Medium on Success of in Vitro Fertilization (IVF)
ClinicalTrials.gov study NCT04456478. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Clinical Profiles And In Vitro Fertilization Success
ClinicalTrials.gov study NCT06260787. IPD Sharing: NO. Countries: 1. Publications: 0.
Exploring the Effect of Footbaths on Increasing the Success Rates in Vitro Fertilization
ClinicalTrials.gov study NCT06624683. IPD Sharing: NO. Countries: 1. Publications: 0.
Does the Embryo Transfer Technique Affect the Success of in Vitro Fertilization?
ClinicalTrials.gov study NCT03756857. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Data from: Male investments in high quality sperm improve fertilization success, but may have negative impact on offspring fitness in whitefish
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Endometrial Volume and Sub-endometrial Vascularity as Predictors of In-vitro Fertilization Success
ClinicalTrials.gov study NCT02381821. IPD Sharing: Not stated. Countries: 0. Publications: 0.
Effect of Traditional Chinese Medicine on In Vitro Fertilization (IVF) Success Rates
ClinicalTrials.gov study NCT01331395. IPD Sharing: Not stated. Countries: 0. Publications: 0.
Transcriptomic profiling of granulosa and cumulus cells for prediction of successful embryo implantation in human in-vitro fertilization procedures
GEO Series GSE55654. Homo sapiens. 64 samples. Type: Expression profiling by array.
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