Kin investment biases of aunts and uncles: associations with phenotypic resemblance and sociodemographic characteristics.

Higher investment in maternal than paternal aunts and uncles is explained by the "paternity uncertainty hypothesis". Regardless of laterality, however, aunts show a greater degree of investment than uncles, which is attributed to sex-specific reproductive strategies. Resemblance cues can be used as indicators of genetic relatedness.

Effect of Month of Birth on Mean Birth Length in Austrian Newborns Born Between 1984 and 2021.

Objective: The length of newborns shows seasonal fluctuations, but the patterns of these fluctuations vary greatly. This study analyses the fluctuation in birth length by birth month and temporal changes in Austrian newborns from the 1984 to 2021 birth cohorts.

Methods: A total of 2 317 927 singleton-term births between 1984 and 2021 in Austria were included in this retrospective population-based cohort study.

Menopause in a globalized world - A systematic literature review focussing on the challenge of health problems associated with menopausal transition among women with a migration background.

Globalization and international migration movements have massively changed the population structure of most industrial nations in recent decades. The ever-increasing proportion of people with a migration background also poses a challenge for the medical sector. A particular problem is the stressful phase of the menopausal transition, which - although not a pathological phenomenon but part of the female life history - can lead to psychological and physical symptoms due to hormonal changes, which significantly impair the quality of life of the women affected.

Changes in weight status among "Ju/'hoansi" San hunter-gatherers between 1968/69 and 1987-The effects of nutritional transition, sex and age.

Background: Changes in lifestyle and dietary habits that hunter-gatherer populations have undergone in recent decades have often led to rising obesity rates with disastrous consequences for their health.

Objectives: The associations between dietary habits and weight status were studied in 238 "Ju/'hoansi" San (93 women and 145 men) aged between 18 and 65 years in northern Namibia in 1987. Weight status was estimated based on the World Health Organization body mass index (BMI) categories, and dietary habits were recorded using food recall methods.

Assisted reproductive technology (ART) is not an independent risk factor for breech presentation among singleton term births in Vienna, Austria.

Assisted reproductive technologies (ARTs) such as in vitro fertilisation (IVF) and intracytoplasmic sperm injection (ICSI) are still discussed critically, as there is no consensus on whether these treatments could be the cause of risk factors for obstetric problems such as breech presentation. The aim of this study was to test the association between ART and breech presentation among 11920 singleton term births taking place in Vienna from 2010 to 2020. In this single-centre medical record-based study, data concerning the conception mode (spontaneous versus IVF or ICSI), child presentation, birth mode, newborn sex and size as well as age, height, weight, and reproductive history of the mother were included.