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Categories: Fertility
Published Preconception stress may affect health of women undergoing fertility treatment
(via sciencedaily.com) Original source Stress during pregnancy is known to influence health outcomes, but a new study suggests that stress levels before pregnancy are also important to evaluate. Investigators analyzed the link between self-reported stress immediately before conception among women seeking fertility care and blood glucose levels, a marker of heart health. The team found that maternal stress during preconception was associated with higher blood glucose levels, especially among women using intrauterine insemination to conceive and women of higher socioeconomic status.
Published Nematode proteins shed light on infertility
(via sciencedaily.com) Original source Biologists developed a method for illuminating the intricate interactions of the synaptonemal complex in the nematode C. elegans. The authors identified a trio of protein segments that guide chromosomal interactions, and pinpointed the location where they interact with each other. Their novel method uses a technique known as genetic suppressor screening, which can serve as a blueprint for research on large cellular assemblies that resist traditional structural analysis.
Published Brain cell discovery sparks hope for fertility treatments
(via sciencedaily.com) Original source Researchers have demonstrated how a specific type of neuron in the brain affects the release of hormones that control ovarian function in females. These findings could help researchers understand and treat reproductive disorders in both animals and humans.
Published How do painful fibroids grow?
(via sciencedaily.com) Original source Insights into how uterine tumors grow could give hope to millions of women who deal with painful fibroids.
Published Having a C-section is related to difficulties with conceiving
(via sciencedaily.com) Original source Women who delivered their previous pregnancy by C-section spent a longer time trying to conceive their next pregnancy. Additionally, women who spent a longer time trying to conceive their current pregnancy were more likely to deliver by C-section. The authors concluded that differences in time spent trying to conceive are unlikely to be due to the surgical procedure itself.
Published Filling data gaps to assess the role of education in fertility decline
(via sciencedaily.com) Original source Researchers have introduced an innovative methodology for reconstructing data on fertility and education, particularly in developing countries with inconsistent or unreliable data sets.
Published Exposure to air pollution in utero may affect reproductive system development
(via sciencedaily.com) Original source From invisible wafts of diesel exhaust to sun-choking plumes of orange smoke, air pollution is known to damage respiratory well-being. Now, research suggests another reason to hold our breath: Polluted air also may hurt reproductive health. In a study of air pollution data in relation to markers of reproductive development in infancy, Rutgers researchers found certain pollutants may negatively alter anogenital distance, a measure of prenatal exposure to hormones.
Published New study finds association between insecticide exposure and lower sperm concentration in adult men
(via sciencedaily.com) Original source Researchers have found in a new systematic review that there is a strong association between insecticide exposure and lower sperm concentration in adult men globally.
Published Mobile phone use may affect semen quality, study shows
(via sciencedaily.com) Original source Does electromagnetic radiation emitted by mobile phones affect semen quality? While various environmental and lifestyle factors have been proposed to explain the decline in semen quality observed over the last fifty years, the role of mobile phones has yet to be demonstrated. A team has now published a major cross-sectional study on the subject. It shows that frequent use of mobile phones is associated with a lower sperm concentration and total sperm count.
Published Sperm adjust their swimming style to adapt to fluctuating fluid conditions
(via sciencedaily.com) Original source Sperm can modulate their energetics by regulating their flagellar waveform -- how the sperm oscillate their tails -- in order to adapt to varying fluid environments, potentially optimizing their motility and navigation within the reproductive tract, according to new research.
Published COVID vaccination in female, male partners does not increase risk of miscarriage, study finds
(via sciencedaily.com) Original source A new study provides deeper insight into the safety of COVID-19 vaccines for people planning to become pregnant. The study found no increased risk of early or late miscarriage as a result of male or female partners getting a COVID-19 vaccine prior to conceiving.
Published Possible cause of male infertility
(via sciencedaily.com) Original source Mature spermatozoa are characterized by an head, midpiece and a long tail for locomotion. Now, researchers have found that a loss of the structural protein ACTL7B blocks spermatogenesis in male mice. The cells can no longer develop their characteristic shape and remain in a rather round form. The animals are infertile.
Published Membrane transporter ensures mobility of sperm cells
(via sciencedaily.com) Original source Special proteins -- known as membrane transporters -- are key to the mobility of sperm cells. A research team has, with the aid of cryo-electron microscopy, succeeded in decoding the structure of such a transporter and its mechanism. These findings will enable a better understanding of the molecular foundations of reproductive capacity and could, in the long term, contribute to developing new approaches to treating fertility disorders and new methods of specific contraception.
Published Study suggests that having common ancestors can jeopardize fertility for generations
(via sciencedaily.com) Original source New research provides rare direct evidence showing that increased homozygosity -- meaning two identical alleles in a genome -- leads to negative effects on fertility in a human population.
Published Bacteria can enhance host insect's fertility with implications for disease control
(via sciencedaily.com) Original source New research reveals how the bacteria strain Wolbachia pipientis enhances the fertility of the insects it infects, an insight that could help scientists increase the populations of mosquitoes that do not carry human disease.
Published Why do some men not produce sperm?
(via sciencedaily.com) Original source Millions of couples worldwide experience infertility with half of the cases originating in men. For 10 percent of infertile males, little or no sperm are produced. Now, new research is shedding light on what may be going wrong in the process of sperm formation, leading to potential theories on possible treatments.
Published Study finds men's antidepressant use did not negatively impact IVF success
(via sciencedaily.com) Original source In vitro fertilization (IVF) is a time-intensive and often stress-inducing fertility procedure. Yet how does that stress impact its success? Investigators have now assessed the effects of anxiety and depression in men on fertility and IVF outcomes.
Published Researchers uncover mechanism that links NAD+ to fertility problems
(via sciencedaily.com) Original source A woman's fertility normally decreases by her late 30s with reproductive function eventually ceasing at menopause. It is known that a small molecule called nicotinamide adenine dinucleotide (NAD+) plays a critical role in this decline, and scientists have revealed how this happens and have identified potential new approaches to enhance reproductive longevity.
Published Researchers studied thousands of fertility attempts hoping to improve IVF
(via sciencedaily.com) Original source By genetically testing nearly one thousand embryos, scientists have provided the most detailed analysis of embryo fate following human in vitro fertilization.
Published Mature sperm lack intact mitochondrial DNA
(via sciencedaily.com) Original source New research provides insight about the bedrock scientific principle that mitochondrial DNA -- the distinct genetic code embedded in the organelle that serves as the powerplant of every cell in the body -- is exclusively passed down by the mother.