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Categories: Fertility, Relationships

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Whether infants at five months of age look mostly at faces or non-social objects such as cars or mobile phones is largely determined by genes. The findings suggest that there is a biological basis for how infants create their unique visual experiences and which things they learn most about.

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As possibilities have changed and technology has advanced, memories and nostalgia are now a significant part of our use of social media.

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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.

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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. 

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Researchers incorporate language ideologies, along with the impact of interaction between individuals with opposing preferences, on the language shift process. The team chose a quantitative approach based on a society in which only one language with two varieties, the standard and the vernacular, existed. The resulting mathematical model can predict the conditions that allow for the coexistence of different languages, presenting a comprehensive view of how language varieties are distributed within societies.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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. 

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Married couples and long-term romantic partners typically engage in a variety of behaviors that sustain and nourish the relationship. These actions promote higher levels of commitment, which benefits couples' physical and psychological health. A new study looks at how such relationship maintenance behaviors interact with satisfaction and commitment.

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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.

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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.

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Why do we dream? A product of our brain's neurophysiology, dreaming is a complex experience that can take on many emotional tones and simulate reality to varying degrees. As a result, there is still no clear answer to this question. A study compared the dreams of two forager communities, in Tanzania and the Democratic Republic of Congo, with those of individuals living in Europe and North America. It showed that the first two groups produced more threatening, but also more cathartic and socially-oriented dreams than the Western groups. These results show how strong are the links between the socio-cultural environment and the function of dreams.

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Shyness can influence a child’s performance in language assessments, depending on the level of social interaction required to complete the test.

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When we’re married or in a long-term romantic relationship, we may eventually come to take each other for granted and forget to show appreciation. A new study finds that it doesn’t have to stay this way. The study examined why perceived gratitude from a spouse or romantic partner changes over time, and whether it can be improved through relationship intervention programs.

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Researchers have learned the efficiency by which people recognize spoken words depends as much on the mind as on hearing ability. In a new study, the researchers examined how well adults across the life span process spoken language.