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1.
Proc Natl Acad Sci U S A ; 119(23): e2020901119, 2022 06 07.
Artículo en Inglés | MEDLINE | ID: mdl-35648824

RESUMEN

Divorces are predominantly initiated by one spouse alone. This might suggest that one spouse typically benefits from divorce (the initiator), while the other is disadvantaged (the noninitiator). At the same time, empirical research on the consequences of divorce commonly focuses on the average effect for both partners. In contrast, I estimate separation trajectories individually for initiators and noninitiators of formerly cohabitating or married couples. The analysis covers a wide range of outcomes and a long period of time surrounding the separation. I employ an event-study design based on individual fixed effects, thereby accounting for time-invariant individual heterogeneity that could be linked to initiator status and the outcomes. The results reveal substantial differences in separation trajectories between initiators and noninitiators. Initiators indeed improve their subjective well-being after a separation and also see gains in other life domains, with the exception of the economic domain. Noninitiators experience significant short-term losses in subjective well-being, from which they recover in the long run. Noninitiators' trajectories in other life domains vary.


Asunto(s)
Divorcio , Esposos , Divorcio/psicología , Femenino , Humanos , Masculino
2.
Am Nat ; 204(4): E70-E84, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39326056

RESUMEN

AbstractWhether natural selection leads to attachment in monogamous pair bonds has seldom been addressed. Operationally defining attachment as a behavioral modifier that decreases divorce probability with pair duration, we develop a model for the evolution of attachment. If divorce (the ending of a pair bond when both individuals survive to the next breeding season) is more likely to occur out of poor-quality reproductive opportunities (i.e., poor territory or low-quality mate), individuals in experienced pairs are more likely to be found in high-quality opportunities. Consequently, when divorce decisions occur using imperfect information from reproductive success, pair duration provides individuals with information about the quality of their reproductive opportunity and attachment can evolve. We show that high survival rates, divorce propensities, and probabilities of nest failure favor the evolution of attachment. Attachment is also more likely to evolve when individuals can directly assess the quality of their reproductive opportunity (as opposed to relying on imperfect information from reproductive success), when the quality of the reproductive opportunity has adult survival ramifications, and when divorce coevolves with attachment. We show that our core conclusions are robust to a variety of assumptions using individual-based simulations. Our results clarify how attachment can be adaptive and suggest that studying pair bonds as dynamic entities is a promising avenue for future work.


Asunto(s)
Evolución Biológica , Apareamiento , Animales , Masculino , Femenino , Modelos Biológicos , Reproducción , Selección Genética
3.
Demography ; 61(4): 1097-1116, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39012245

RESUMEN

The introduction of unilateral divorce legislation (UDL) starting in the late 1960s led to spikes in U.S. divorce rates. We ask whether making divorce easier affected the educational structure of marriage. Using marriage and divorce certificate data covering 1970-1988, we provide new evidence on the evolution of the educational structure of marriage inflows (newlyweds) and outflows (divorces). Next, we leverage the timing of UDL introduction across states to estimate its effects on both flows. We find that UDL affected the educational structure of divorce but not of new marriages: it made generally unstable hypogamous couples (women married to less educated partners) less likely to divorce and made homogamous couples more stable than hypergamous ones (women married to more educated partners).


Asunto(s)
Divorcio , Escolaridad , Matrimonio , Humanos , Divorcio/legislación & jurisprudencia , Femenino , Estados Unidos , Masculino , Matrimonio/legislación & jurisprudencia , Adulto , Factores Socioeconómicos , Persona de Mediana Edad , Adulto Joven
4.
Demography ; 61(3): 597-613, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38770913

RESUMEN

The economic consequences of divorce and separation for women are commonly associated with the chronic strain model, according to which women's losses are large and persistent. This research note shifts the focus to a crisis model highlighting women's potential of, and routes to, recovery from initial losses. Drawing on German Socio-Economic Panel data (1984-2021) on women in marital and cohabiting unions (N ∼ 27,000 women, N ∼ 3,400 divorces and separations), we use fixed-effects regression models and event-history models to analyze changes in equivalized monthly household income and poverty risk across the process of divorce and separation. Results show that most women recovered from their initial economic declines. Although initial losses were common and often sizable, large fractions of women eventually returned to or exceeded the household income expected in the absence of divorce and separation. Recovery was facilitated by the "traditional" route of repartnering and the "modern" route of women mobilizing their productive skills. Both routes appeared more important than the absence of barriers, such as children in the household. We conclude that for the majority of women, the economic consequences of divorce and separation are better described as a temporary crisis than as a chronic strain.


Asunto(s)
Divorcio , Renta , Factores Socioeconómicos , Humanos , Divorcio/estadística & datos numéricos , Divorcio/economía , Femenino , Renta/estadística & datos numéricos , Alemania , Adulto , Persona de Mediana Edad , Pobreza/estadística & datos numéricos , Factores Sociodemográficos
5.
Demography ; 2024 Sep 13.
Artículo en Inglés | MEDLINE | ID: mdl-39269028

RESUMEN

Many studies demonstrate an intergenerational transmission of divorce with a focus primarily on more recent decades; however, the extent to which this relationship is deeply rooted or has changed over time remains unclear. Explanations, including sociodemographic and interpersonal factors, have been offered as links between parental divorce and the stability of offspring's marriage. We use individual-level longitudinal data from the Scanian Economic-Demographic Database to estimate the intergenerational transmission of divorce among first marriages in Sweden over the period 1920-2015. Our investigation focuses on the correlation between parental divorce and offspring's divorce during the transition from a low- to a high-divorce regime. Findings reveal surprising stability in the transmission despite fundamental societal change over the years. Notably, the risk of divorce is highest when either the wife or both spouses have experienced parental divorce. Moreover, the transmission of divorce across time appears to be stronger and more stable for women than for men. These results suggest the intergenerational transmission of divorce is part of the divorce transition and highlight the role of women's independence in this intricate but not yet fully understood process.

6.
Dev Psychopathol ; : 1-17, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363868

RESUMEN

Using data from a 15-year longitudinal follow-up of a randomized controlled trial of a parenting-focused preventive intervention for divorced families (N = 240) with children aged 9-12, the current study examined alternative cascading pathways through which the intervention led to improvements in offspring's perceived health problems, BMI, and cigarette smoking in emerging adulthood. It was hypothesized that the program would lead to improvements in these health-related outcomes during emerging adulthood through progressive associations between program-induced changes in parenting and offspring outcomes, including mental health problems, substance use, and competencies. Intervention-induced improvements in positive parenting at posttest led to improvements in mental health problems in late childhood/early adolescence, which led to lower levels of mental health and substance use problems as well as higher levels of competencies in adolescence, which led to improvements in the health-related outcomes. Academic performance predicted all three health-related outcomes and other aspects of adolescent functioning showed different relations across outcomes. Results highlight the potential for intervention effects of preventive parenting interventions in childhood to cascade over time to affect health-related outcomes in emerging adulthood.

7.
Proc Natl Acad Sci U S A ; 118(14)2021 04 06.
Artículo en Inglés | MEDLINE | ID: mdl-33785589

RESUMEN

We conducted a field experiment in which 311 low-income individuals seeking a divorce were randomly assigned to receive access to a pro bono lawyer (versus minimal help) to assist with filing for divorce. Examining court records, we found that assignment to an attorney made a large difference in whether participants filed for and obtained a divorce. Three years after randomization, 46% of the treated group had terminated their marriages in the proper legal venue, compared to 9% of the control group. Among "compliers"-participants who obtained representation only if assigned to receive it-those with lawyers were far more likely to file for and obtain a divorce than those not assigned lawyers. Because divorce implicates fundamental constitutional interests and can be effectuated only by resort to the courts, the US Constitution requires that dissolution of marriage be made achievable regardless of ability to pay. Yet, we observed few low-income individuals who were able to initiate divorce suits on their own. Through interviews and archival research, we identified barriers that low-income litigants faced in navigating the divorce system, including mandatory wait times, limited hours at important facilities, and burdensome paperwork sometimes requiring access to photocopiers and typewriters. This study therefore documents a salient instance in which a civil legal process was inaccessible to those without lawyers, even though their legal issues were straightforward, involving few if any matters for courts to adjudicate.

8.
Proc Natl Acad Sci U S A ; 118(7)2021 02 16.
Artículo en Inglés | MEDLINE | ID: mdl-33526594

RESUMEN

Using archived social media data, the language signatures of people going through breakups were mapped. Text analyses were conducted on 1,027,541 posts from 6,803 Reddit users who had posted about their breakups. The posts include users' Reddit history in the 2 y surrounding their breakups across the various domains of their life, not just posts pertaining to their relationship. Language markers of an impending breakup were evident 3 mo before the event, peaking on the week of the breakup and returning to baseline 6 mo later. Signs included an increase in I-words, we-words, and cognitive processing words (characteristic of depression, collective focus, and the meaning-making process, respectively) and drops in analytic thinking (indicating more personal and informal language). The patterns held even when people were posting to groups unrelated to breakups and other relationship topics. People who posted about their breakup for longer time periods were less well-adjusted a year after their breakup compared to short-term posters. The language patterns seen for breakups replicated for users going through divorce (n = 5,144; 1,109,867 posts) or other types of upheavals (n = 51,357; 11,081,882 posts). The cognitive underpinnings of emotional upheavals are discussed using language as a lens.


Asunto(s)
Cognición , Divorcio/psicología , Emociones , Lenguaje , Medios de Comunicación Sociales/estadística & datos numéricos , Adaptación Psicológica , Humanos , Pensamiento
9.
Aging Ment Health ; : 1-9, 2024 Jul 11.
Artículo en Inglés | MEDLINE | ID: mdl-38990123

RESUMEN

OBJECTIVES: To examine in-depth experiences of loneliness and freedom after late-life divorce from an intergenerational familial/dyadic perspective in a family-oriented society that also values self-determination. Considering the expansion of late-life divorce, it is important to understand its consequences for the family wellbeing. METHOD: According to phenomenology tradition, data was collected through 51 semi-structured qualitative interviews, comprised from 7 family units (n = 33) including all/most family members and 9 parent-child dyads (n = 18), using thematic-analysis and dyadic interview-analysis principles. Analyzing family units enables a more complex examination of the phenomena, providing a holistic view of family life. RESULTS: Loneliness and freedom experienced simultaneously was the most common. A gap was identified between generations regarding benefits and costs of late-life divorce. Whereas most divorcees emphasized the benefits of freedom, most of their adult-children mainly described the disadvantages of loneliness, perceiving both loneliness and freedom as negative. CONCLUSION: Late-life divorce is a complex experience comprised of both loneliness and freedom. Each generation experiences the benefits and costs of late-life divorce differently. Unique aspects of freedom and loneliness at old age in a socio-cultural context located between self-determination and family-oriented are discussed, including strategies of coping with loneliness. Implications for families and professionals are presented.

10.
J Res Adolesc ; 34(2): 568-583, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38375748

RESUMEN

Using data of 166 adolescents from divorced families, this study examined longitudinal associations between the quantity and quality of adolescents' residential contact and digital contact with parents, and their sense of family belonging. Cross-lagged panel models showed concurrent associations among adolescents' residential and digital contact with each parent, yet positively for fathers and negatively for mothers. Some cross-lagged paths revealed that higher-quality interactions may contribute to positive changes in contact. Although there were effects of parent-adolescent contact on family belongingness, over time belongingness was mostly predicted by the general quality of contact. The results suggest that post-divorce relationships require frequent and meaningful time together, the effects of which, however, do hardly transfer over time in terms of adolescents' belongingness.


Asunto(s)
Divorcio , Humanos , Femenino , Masculino , Adolescente , Divorcio/psicología , Estudios Longitudinales , Relaciones Padres-Hijo , Padre/psicología , Madres/psicología , Conducta del Adolescente/psicología
11.
Fam Process ; 63(1): 284-298, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36647297

RESUMEN

The detrimental effects of parental break-up on children's mental health are well-documented. However, research has also shown that children living in joint physical custody (JPC) arrangements often fare better than children living in sole physical custody (SPC) arrangements. Thus, the question arises: What are the differences between JPC and SPC that account for those results? Drawing on data from the Family Models in Germany (FAMOD) study conducted in 2019, structural equation models (SEM) were estimated to deduct the mediating role of coparenting support in children's mental health in 465 JPC and 652 SPC families with children aged 2-14. The findings suggest that the better mental health observed among children in JPC families than among children in SPC families was fully mediated by coparenting support. However, this held true only for internalizing and externalizing behavior, but not for prosocial behavior as no differences between JPC and SPC were found for this dimension. The findings affirm the importance of supportive coparenting for children's well-being after family dissolution in both SPC and JPC arrangements. After breaking up, parents should be supported in their parental engagement through coparenting counseling or psychoeducation classes.


Asunto(s)
Divorcio , Salud Mental , Niño , Humanos , Divorcio/psicología , Custodia del Niño , Padres/psicología , Alemania , Responsabilidad Parental/psicología
12.
Fam Process ; 63(2): 612-629, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38480468

RESUMEN

Despite the rising divorce rates in some immigrant communities in the US, there has been scant scholarly attention on how immigrants experience divorce, particularly on the role of culture in the divorce process. The primary goal of the present study was to explore the diverse divorce experiences of Hmong immigrants in the United States. As a patrilineal and patriarchal community, divorce is generally frowned upon, with Hmong women often experiencing shame and stigma. A narrative design with nine Hmong women was used to capture their intricate stories that highlight such experiences. Using a thematic analysis, our findings highlighted the complexity and cultural nuances the women in our sample encountered from initiating divorce to the divorce itself: (1) No wants a divorce, (2) Divorce is the "last straw", (3) Varying divorce pathways, and (4) Navigating systems as a Hmong woman. For those who have increased knowledge of both the US American court system and divorce laws along with the traditional Hmong mediations, they may be more equipped in navigating systems. Yet as Hmong divorce practices are performed by Hmong men, Hmong women may struggle with finding their voice or support needed to advocate for their divorce. In such cases, the US court system may be more appealing in assisting their cause (e.g., custody). Professionals working with such communities should be culturally aware and attuned to the different marriage and divorce practices to understand both cultural and legal barriers for those seeking a divorce.


Asunto(s)
Divorcio , Emigrantes e Inmigrantes , Investigación Cualitativa , Humanos , Divorcio/psicología , Femenino , Adulto , Estados Unidos , Emigrantes e Inmigrantes/psicología , Matrimonio/psicología , Matrimonio/etnología , Persona de Mediana Edad , Asiático/psicología
13.
J Youth Adolesc ; 53(6): 1454-1468, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38555339

RESUMEN

Although there is ample evidence on the importance of experiencing autonomy and belonging for positive adolescent development and the supporting role of parents in this regard, most knowledge stems from intact families. As many youth grow up with divorced parents, this study tested longitudinal links between warm and autonomy supportive parenting and coparental cooperation and conflict on the one hand, and adolescents' post-divorce autonomy and belonging on the other. Data consisted of three-wave self-report data of 191 Dutch adolescents (Mage = 14.36, 61.3% girls) and 227 divorced parents (Mage = 46.08, 74% mothers). Random-intercept cross-lagged panel models showed stable between-family differences, with autonomy relating positively to coparenting and parental autonomy support, and belongingness associating positively solely with parenting. No significant effects were found within families, meaning that changes in (co)parental behaviors did not predict adolescents' experiences of autonomy and belonging or vice versa.


Asunto(s)
Divorcio , Relaciones Padres-Hijo , Responsabilidad Parental , Autonomía Personal , Humanos , Femenino , Adolescente , Masculino , Divorcio/psicología , Responsabilidad Parental/psicología , Países Bajos , Estudios Longitudinales , Conducta del Adolescente/psicología , Desarrollo del Adolescente
14.
J Youth Adolesc ; 2024 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-39251473

RESUMEN

Boundary diffusion is a particular risk after divorce and has been associated with adolescents' adjustment problems. Yet, its potential impact on parent-adolescent relationship quality is less straightforward, as previous findings support both an alienation and conflict perspective. Therefore these associations (daily and half-yearly) were examined in recently divorced families, addressing both within-dyad changes and between-dyad differences. Data were collected among a sample of N = 133 (pre)adolescents (Mage = 11.76; 51.5% boys) from 76 divorced families, using a measurement burst design: Every six months, 14 consecutive days of daily diaries were collected, for 5 waves. Between dyads, adolescents who experienced more boundary diffusion than others, also reported more conflict with both their parents. Within dyads, when adolescents experienced more boundary diffusion than usual by one of their parents (actor), warmth decreased and conflict increased between this parent and the adolescent, that same and the following day. Adolescents also engaged in more conflict with the other parent that day. These findings mostly supported the conflict perspective: Post-divorce boundary diffusion appears to be a general risk factor for parent-adolescent conflict with both parents, and from day-to-day boundary diffusion was linked to a deteriorated parent-adolescent relationship quality, especially with the parent that triangulated or parentified them. There were no significant long-term associations, nor did any moderator (age, gender, living arrangement) explain heterogeneity in effects.

15.
Australas Psychiatry ; 32(3): 224-229, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38411444

RESUMEN

OBJECTIVE: This study will examine the role of childhood experience of parental divorce on later perinatal depression and parenting stress. METHODS: 546 women were recruited at less than 20 weeks pregnancy into an ongoing pregnancy cohort study and followed up in pregnancy and the postpartum. Depression at recruitment was measured using the Structured Clinical Interview for the DSM and the Edinburgh Postnatal Depression Scale repeated in pregnancy and the postpartum. Parenting stress was measured at 12 months postpartum using Parenting Stress Index. RESULTS: This study found 33% of women had experienced parental divorce. While we did not find a statistically significant relationship between the experience of parental divorce and perinatal depression, there was a higher rate of perinatal depression when parental divorce occured at a younger age. There was no association with parental divorce and parenting stress. Childhood divorce was significantly associated with other adverse childhood experiences. CONCLUSIONS: Our findings did not support an impact of parental divorce on either maternal perinatal depression or on parenting stress, suggesting the experience of parental divorce for children may not inevitably impact their later experiences as parents. Further research on the association with age of parental divorce and later perinatal mental health is warranted.


Asunto(s)
Divorcio , Responsabilidad Parental , Estrés Psicológico , Humanos , Divorcio/psicología , Divorcio/estadística & datos numéricos , Femenino , Estrés Psicológico/epidemiología , Estrés Psicológico/psicología , Adulto , Embarazo , Responsabilidad Parental/psicología , Depresión Posparto/epidemiología , Adulto Joven , Complicaciones del Embarazo/epidemiología , Complicaciones del Embarazo/psicología , Depresión/epidemiología , Depresión/psicología , Experiencias Adversas de la Infancia/estadística & datos numéricos
16.
J Fam Issues ; 45(3): 674-696, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38571758

RESUMEN

Premarital sex predicts divorce, but we do not know why. Scholars have attributed the relationship to factors such as differences in beliefs and values, but these explanations have not been tested. It is further unclear how this relationship changes by number of sexual partners, or differs by gender. We re-examine this relationship with event history models using data from the National Longitudinal Study of Adolescent to Adult Health. Models include measures of adolescent beliefs and values, religious background, and personal characteristics, as well as approximate number of premarital sexual partners in young adulthood. We find the relationship between premarital sex and divorce is highly significant and robust even when accounting for early-life factors. Compared to people with no premarital partners other than eventual spouses, those with nine or more partners exhibit the highest divorce risk, followed by those with one to eight partners. There is no evidence of gender differences.

17.
J Fam Stud ; 30(5): 838-860, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39319027

RESUMEN

Most studies of discrepancies in parents' reports about children's psychological problems address younger children and psychological problems. The current contribution shifts the focus to adult children and to well-being. In adult intergenerational relationships, knowledge of children's well-being is more uncertain and there is more room for disagreements to arise, especially in the context of divorce. We analyzed Dutch multi-actor survey data, using a sample of triads of adult children, fathers, and mothers (N = 1,440). Two hypotheses were tested about the origins of discrepancies using structural equation models in which child well-being reports were included of parents and self-reports of children. The analyses supported the notion of relational specificity: when parents have a closer and more harmonious relationship with the child, they evaluate the child more positively than the other parent, after controlling for adult children's self-reports of well-being. Qualified support was obtained for the depression-distortion hypothesis, with mothers who have higher well-being themselves being more positive about the child. Discrepancies were larger among separated parents than among married parents and parent-stepparent combinations. The conclusion is that parents do not always have similar views of adult children's well-being and that disagreements are systematic, with bias stemming from the informant and the relationship.

18.
Omega (Westport) ; : 302228241226471, 2024 Jan 16.
Artículo en Inglés | MEDLINE | ID: mdl-38226449

RESUMEN

The shift from the detachment model of mourning to the continuing bonds paradigm in bereavement placed relationships to the deceased alongside relationships to the living. This emphasis on the continuation of the connection to the other person after death paradoxically narrowed the gap between relationships in life and after death. We explore and expand the concept of continuing bonds as it is now used in the field of loss and bereavement by comparing spousal relationships in the living, deceased and divorced. The Two-Track Model of Loss and Bereavement is a framework and clinical paradigm that clarifies similarities and differences in these three pair-bond relationships. The focus on continuing bonds adds and deepens theory, clinical and research aspects of assessing spousal relationship for the living as well as the bereaved and divorced.

19.
Cancer ; 129(22): 3633-3644, 2023 11 15.
Artículo en Inglés | MEDLINE | ID: mdl-37552054

RESUMEN

BACKGROUND: Childhood cancer therapy may cause long-term effects. This cross-sectional study evaluated adulthood milestones in male childhood cancer survivors (CCS). METHODS: The study population comprised 252 male CCS with 6 to 42 years of survival diagnosed at the Children's Hospital in Helsinki (1964-2000) at the age of 0 to 17 years. Sex-, age-, and area of residence-matched population controls were randomly selected from the Finnish national registries. Data on moving away from the parental home, marital status, offspring, and adoption in CCS were compared with the population controls. We analyzed the influence of chemotherapy and radiation exposures and testicular dysfunction (ever nontestosterone-substituted serum follicle stimulating hormone >15 IU/L, luteinizing hormone >15 IU/L, testosterone <2 ng/mL (5 nmol/L), need of testosterone replacement therapy, or testicular volume <12 mL at the end of puberty) during pubertal maturation on long-term social outcomes. RESULTS: CCS moved away from their parental home as frequently as population controls (97.8% vs. 98.5%, p = .45). CCS were less likely to marry or live in a registered relationship (46.4% vs. 57.5%, p < .001), especially when diagnosed at a young age (<4 years). Among those married, the probability of divorce was similar between CCS and population controls (27.4% vs. 23.8%, p = .41). Survivors were less likely to sire a child (38.5% vs. 59.1%, p < .001) and more likely to adopt (2% vs. 0.4%, p = .015). Lower probability of paternity was associated with hematopoietic stem cell therapy, testicular radiation dose >6 Gy, pubertal signs of testicular dysfunction (nontestosterone-substituted serum follicle stimulating hormone >15 IU/L, luteinizing hormone  >15 IU/L, testosterone <2 ng/mL (5 nmol/L), or need of testosterone replacement therapy during puberty, or testicular volume <12 mL at the end of puberty) or azoospermia after puberty. CONCLUSIONS: This study emphasizes the value of pubertal monitoring of testicular function to estimate future probability of paternity. If no signs of dysfunction occurred during pubertal follow-up, paternity was comparable to population controls. Testicular radiation dose >6 Gy appeared to be the strongest risk factor for decreased paternity. PLAIN LANGUAGE SUMMARY: Treatment with intensive therapies, including hematopoietic stem cell therapy, testicular radiation dose >6 Gy, and signs of testicular dysfunction, during puberty are important risk factors for lower rates of fertility. Intensive therapies and testicular dysfunction itself do not similarly hamper psychosocial milestones in adulthood; cancer diagnosis at a very young age (<4 years) lower the probability of marriage. This study accentuates the importance of monitoring of pubertal development, emphasizing on testicular function, not only sperm analysis, to estimate future fertility among male childhood cancer survivors.


Asunto(s)
Neoplasias , Niño , Humanos , Masculino , Recién Nacido , Lactante , Preescolar , Adolescente , Neoplasias/tratamiento farmacológico , Estudios Transversales , Paternidad , Semen , Testículo , Testosterona , Hormona Folículo Estimulante , Hormona Luteinizante
20.
Proc Biol Sci ; 290(2002): 20230450, 2023 07 12.
Artículo en Inglés | MEDLINE | ID: mdl-37403502

RESUMEN

Socially monogamous birds may break up their partnership by a so-called 'divorce' behaviour. Divorce rates vary immensely across avian taxa that have a predominantly monogamous social mating system. Although various factors associated with divorce have been tested, broad-scale drivers of divorce rate remain contentious. Moreover, the influence of sexual roles in divorce still needs further investigation because of the conflicting interests of males and females over mating and fertilization. Here, we applied phylogenetic comparative methods to analyse one of the largest datasets ever compiled that included divorce rates from published studies of 186 avian species from 25 orders and 61 families. We tested correlations between divorce rate and a group of factors: 'promiscuity' of both sexes (propensity to polygamy), migration distance and adult mortality. Our results showed that only male promiscuity, but not female promiscuity, had a positive relationship with divorce rate. Furthermore, migration distance was positively correlated with divorce rate, whereas adult mortality rate showed no direct relationship with divorce rate. These findings indicated that divorce might not be a simple adaptive (by sexual selection) or non-adaptive strategy (by accidental loss of a partner) in birds but it could be a mixed response to sexual conflict and stress from the ambient environment.


Asunto(s)
Matrimonio , Conducta Sexual Animal , Animales , Femenino , Masculino , Aves/fisiología , Apareamiento , Filogenia , Conducta Sexual Animal/fisiología
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