scholarly journals Persepsi mahasiswa Fakultas Ilmu Keolahragaan Universitas Negeri Yogyakarta terhadap atribut produk minuman kesehatan

2018 ◽  
Vol 6 (2) ◽  
pp. 184-192
Author(s):  
Chairina Vidya ◽  
Fatma Zuhrotun Nisa ◽  
Ika Ratna Palupi
Keyword(s):  
Nutritional Value ◽  
Consumer Preferences ◽  
Physical Activities ◽  
The Body ◽  
Descriptive Statistics ◽  
State University ◽  
Product Attributes ◽  
Cross Sectional ◽  
Cross Sectional Design ◽  
Sports Sciences

Pemberian cairan sangat penting bagi atlet untuk menghindari dehidrasi yang dapat menyebabkan gangguan fisiologis tubuh. Produk minuman kesehatan diyakini mampu meningkatkan energi dan menjaga produktivitas pada saat dan setelah melakukan aktivitas fisik seperti bekerja dan olahraga, terutama bagi para olahragawan. Perilaku membeli produk minuman kesehatan dilakukan berdasarkan preferensi dan kebutuhan konsumen, salah satunya mempertimbangkan atribut produk. Penelitian ini bertujuan untuk mengetahui persepsi mahasiswa Fakultas Ilmu Keolahragaan Universitas Negeri Yogyakarta (FIK UNY) terhadap atribut produk minuman kesehatan (harga, kemasan, merek, label, dan rasa). Penelitian menggunakan desain observasional cross sectional dengan subjek penelitian 100 orang mahasiswa FIK UNY yang diambil secara purposif. Analisis data menggunakan statistik deskriptif. Hasil penelitian menunjukkan bahwa sebagian besar subjek memiliki persepsi positif terhadap atribut produk minuman kesehatan. Kemasan yang mudah dibawa dan dipegang serta informasi nilai gizi merupakan indikator yang dianggap paling penting oleh subjek. Perception on healthy drink product attributes among sports sciences college students in Universitas Negeri Yogyakarta AbstractIntake of fluids is very important for athletes to avoid dehydration which can cause physiological disorders of the body. Health drink products are supposed to increase energy and maintain productivity during and after physical activities such as work and exercise, especially for athletes. The behavior of buying health drink products is based on consumer preferences and needs, one of them considering product attributes. This study aimed to determine perception of students of the Faculty of Sport Sciences Yogyakarta State University (FIK UNY) on the attributes of health drink products (price, packaging, brand, label, and taste). The research used observational cross-sectional design. Subjects were 100 students of FIK UNY selected through purposive sampling. Data analysis employed descriptive statistics. The results showed that most respondents had positive perceptions on health drink product attributes. Packaging that was easy to carry and hold as well as information of nutritional value was an indicator that was considered most important by the subjects.

scholarly journals Living in a Larger Body: Do Exercise Motives Influence Associations between Body Image and Exercise Avoidance Motivation?

2020 ◽  
Vol 18 (1) ◽  
pp. 72
Author(s):  
Christy Greenleaf ◽  
Alexandra M. Rodriguez
Keyword(s):  
The Body ◽  
Body Appreciation ◽  
Body Surveillance ◽  
Cross Sectional ◽  
Mediation Analyses ◽  
Avoidance Motivation ◽  
Reasons For Exercise ◽  
Exercise Motives ◽  
Cross Sectional Design ◽  
Relationship Health

The study explored reasons for exercise as possible mediators of the relationship between body appreciation and exercise avoidance motivation and between body surveillance and exercise avoidance motivation. Using a cross-sectional design, 131 women with a body mass index (BMI) of 25 or higher completed measures of body surveillance, body appreciation, reasons for exercise, and exercise avoidance motivation. Mediation analyses indicated that appearance-oriented reasons for exercise partially mediated the body surveillance–exercise avoidance motivation relationship. Health and fitness professionals, organizations, and environments should avoid reinforcing appearance-oriented reasons for exercise. Rather, empowering exercise experiences and environments should be created as they seem to benefit women regardless of reasons for exercise.

scholarly journals Korelasi Panjang Tulang Tibia Terhadap Tinggi Badan Pada Mahasiswa FK UMSU

2018 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Putra Diandro Utama Ritonga ◽  
Hendra Sutysna
Keyword(s):  
Linear Regression ◽  
Body Height ◽  
Sampling Technique ◽  
The Body ◽  
Clinical Context ◽  
Exclusion Criteria ◽  
Cross Sectional ◽  
Regression Formula ◽  
Cross Sectional Design ◽  
Tibia Length

<p><strong><em>Introduction</em></strong><strong><em>:</em></strong><strong><em> </em></strong><em>Estimation of body height is one of the important parameter in the anthropology forensic, which the body height became the first action in identification. The regression formula using the tibia length, sex, and age might have valid approximation for body height which helpful in clinical context.</em><em> </em><em></em></p><p><strong><em>Methods</em></strong><strong><em>:</em></strong><strong><em> </em></strong><em>The analytic descriptive researchwith the cross-sectional design was done on 112 subject consist of male and female satisfy inclusion and exclusion criteria. Sample was selected by total sampling technique.</em><em></em></p><p><strong><em>Result</em></strong><strong><em>s: </em></strong><em>Tibia length resulting correlation ranging between 0,488 and 0,968 (p&lt;0,001). The</em><em> </em><em>linear regression formula showed Standard Error of the Estimate (SEE) ranging between 0,810 and 3,495 (p&lt;0,001).</em><strong><em> </em></strong><em></em></p><p><strong><em>Conclusion: </em></strong><em>A significant correlation between tibia length and body heightwas found with a strong correlation. Hence, a linear regression formula was derived for the estimation of body height from tibia length</em>.</p><p><strong>Keywords</strong>: tibia length; body height; regression formula; anthropometry</p>

scholarly journals Gambaran kadar limfosit pada pekerja bangunan

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Dhea Tiara ◽  
Murniati Tiho ◽  
Yanti M. Mewo
Keyword(s):  
Physical Activity ◽  
Time Management ◽  
High Intensity ◽  
Sampling Technique ◽  
The Body ◽  
Construction Workers ◽  
Cross Sectional ◽  
Intensity Physical Activity ◽  
Body Construction ◽  
Cross Sectional Design

Abstract: Humans spend most of their time on activities. In this modern era, due to increasing competitiveness, everyone is demanded to work harder, causing an ineffective time management. The increase of activity can affect health if not accompanied with adequate rest. The increase of activity can affect physiological function that can cause stress to the body. When stress occured, sympathic nervous and adrenal gland will affect the body's immune system, one of them is lymphoid tissue. Physical activity with moderate to high intensity can cause a change of lymphocyte level in the body. Construction workers are one of the kind of high intensity physical activity. This study aimed to discover the description of lymphocyte level on construction workers. This study was conducted on August 2016 to December 2016. This study is a descriptive study with cross sectional design and the sampling technique was total sampling, 30 respondents were participating. The study result showed that lymphocyte level on 17 respondents (56,7%) was normal, 4 respondents (13,3%) had an elevated lymphocyte level and 9 respondents (30%) had a depressed lymphocyte level. Conclusion: This study result that most of the respondents had a normal lymphocyte level.Keywords: lymphocyte level, construction worker, physical activity. Abstrak: Manusia menghabiskan sebagian besar waktu untuk beraktivitas. Di era modern ini, karena tingkat persaingan semakin tinggi, setiap orang dituntut untuk bekerja lebih keras, sehingga menyebabkan orang tidak dapat mengatur waktu secara efektif. Peningkatan aktivitas dapat mempengaruhi kesehatan jika tidak disertai dengan istirahat yang cukup. Peningkatan aktivitas fisik dapat mempengaruhi fungsi fisiologi tubuh yang akhirnya akan menimbulkan stres pada tubuh. Pada saat terjadi stres, saraf simpatik dan kelenjar adrenal akan mempengaruhi sistem imun, salah satunya adalah jaringan limfoid. Aktivitas fisik dengan intensitas sedang sampai berat dapat menyebabkan perubahan jumlah limfosit dalam tubuh. Pekerja bangunan merupakan salah satu aktivitas fisik dengan intensitas berat. Penelitian ini bertujuan untuk mengetahui gambaran kadar limfosit pada pekerja bangunan. Penelitian ini dilakukan pada bulan Agustus 2016 sampai dengan Desember 2016. Penelitian ini merupakan penelitian deskriptif dengan desain penelitian cross-sectional dan pengambilan sampel secara total sampling dengan 30 orang responden. Dari hasil penelitian didapatkan bahwa gambaran kadar limfosit pada pekerja bangunan terdapat 17 responden (56,7%) memiliki kadar limfosit normal, 4 responden (13,3%) memiliki kadar limfosit meningkat dan 9 responden (30%) memiliki kadar limfosit menurun. Simpulan: Sebagian besar responden memiliki kadar limfosit normal. Kata kunci: kadar limfosit, pekerja bangunan, aktivitas fisik.

scholarly journals PERBEDAAN SUHU TUBUH BAYI BARU LAHIR ANTARA BAYI YANG BERHASIL MELAKUKAN INISIASI MENYUSU DINI DAN BAYI YANG TIDAK BERHASIL MELAKUKAN INISIASI MENYUSU DINI

2019 ◽  
Vol 2 (2) ◽  
pp. 133
Author(s):  
Aprilia Aprisanti Reyani
Keyword(s):  
Body Temperature ◽  
Random Sampling ◽  
Statistical Tests ◽  
The Body ◽  
Breastfeeding Initiation ◽  
Chi Square ◽  
Cross Sectional ◽  
Chi Square Test ◽  
The Difference ◽  
Cross Sectional Design

Latar Belakang :Kehangatan dada ibu dapat menghangatkan bayi, sehingga apabila bayi diletakan di dada ibunya segera setelah melahirkan atau dilakukan Inisiasi Menyusu Dini, dapat menurunkan resiko hipotermia dan menurunkan kematian bayi baru lahir akibat kedinginan atau hipotermia. Tujuan : Tujuan dari penelitian ini adalah untuk mengetahui perbedaan suhu tubuh bayi baru lahir antara bayi yang berhasil melakukan IMD dan bayi yang tidak berhasil melakukan IMD Metode  :Analitik,desain cross sectional,populasi semua bayi baru lahir, sampel bayi barulahir, teknik Non Random Sampling, pengumpulan data dengan menggunakan Lembar Observasi dengan menggunakan uji Chi-Square dengan nilai signifikan α = 0.05 yaitu bila hasil uji statistik menunjukan p ≤ α maka H0 ditolak. Hasil      :Suhu tubuh bayi baru lahir yang berhasil melakukan IMD sebagianbesardengansuhutubuhtidakhipotermisebanyak 20 bayi (87%) Suhu tubuh bayi baru lahir yang tidak berhasil melakukan IMD sebagianbesardengansuhutubuhhipotermisebanyak 8 bayi (66,7%). Dari hasil uji statistik diperoleh hasil nilai p = 0,005 < α = 0.05 maka H1 diterima, artinya ada Perbedaan suhu tubuh bayi baru lahir yang berhasil melakukan IMD dan yang tidak berhasil melakukan IMD Kesimpulan :Terdapat perbedaan suhu tubuh bayi baru lahir antara bayi yang berhasil melakukan IMD dan bayi yang tidak berhasil melakukan IMD.   Kata kunci : Inisiasi Menyusu Dini, Suhu Tubuh Bayi Baru Lahir                                                                                               THE DIFFERENCE BODY TEMPERATURE BETWEEN BABIES WHO SUCCESSFULLY INITIATE BREASTFEEDING EARLY AND BABIESWHO FAIL TO INITIATE EARLY BREASTFEEDING AT RSIA KIRANA SIDOARJO 2019  Background : The warmth of the mother’s chest can warm the baby, so that when the baby is in the mother’s breast immediately after birth or initiated early breastfeeding can reduce the mortality rate of newborns due to hypotermia.Purpose :the purpose of this study was to determine the difference in body temperature of newborns between infants who successfully initiated early breastfeeding and infants who did not succeed in initiating early breastfeedingMethods : analytical, cross sectional design, population 40 newborns, samples 35 newborns, Non Random Sampling techniques, the data accumulation using observation sheets and using chi-square test, with significant value α = 0.05 is when the statistical test results show p ≤ α then Ho is rejected.Result : The body temperature of the newborn who succeeded in initiating early breastfeeding was 36.78ºC with 23 (65.7%) of infants none having hypothermia, the newborn baby's body temperature that did not succeed in doing this early breastfeeding was 35.78ºC With 8 infants experiencing hypothermia, while 4 babies with normal temperature. From the results of statistical tests obtained results with the value p = 0,000 <α = 0.05 then H1 accepted, meaning there is a difference in body temperature of a newborn who successfully initiated early breastfeeding and who did not succeed in Early Breastfeeding Initiation. Conclusion : There is a difference in the body temperature of a newborn between infants who successfully initiated breastfeeding and infants who are not successful in initiating early breastfeeding....Keywords : Early breastfeedinginitiation, newborns temperature

scholarly journals Comparison of Serum HIF-1α Levels in Swimming Athletes Before and After Hypoxic Non-Hypoxic Exercise

2020 ◽  
Vol 21 (1) ◽  
pp. 36-39
Author(s):  
Syahrastani Syahrastani ◽  
Argantos Argantos ◽  
Siska Alicia Farma
Keyword(s):  
Aerobic Exercise ◽  
The Body ◽  
Anaerobic Exercise ◽  
Adaptation To Hypoxia ◽  
Cross Sectional ◽  
Hypoxic Conditions ◽  
Before And After ◽  
Cross Sectional Design ◽  
Age Range ◽  
Hypoxic Exercise

The situation of lack of oxygen supply to cells and tissues is often not realized by many people (hypoxia). Hypoxia can occur in various situations in life. The main effect of hypoxia is the effect on the brain, so the body will do everything it can to restore the state of homeostasis. HIF-1α protein is a marker of hypoxic conditions. HIF-1α regulates the synthesis of many genes to maintain and restore body homeostasis from hypoxia to normoxia. This study was a descriptive study with cross-sectional design. The sample of this study were six swimming athletes with a 12-19 year age range who met the inclusion and exclusion criteria. The HIF-1α protein is measured by the ELISA method. Data were analyzed statistically. The results showed higher levels of HIF-1α after anaerobic exercise than the levels of HIF-1α before and after aerobic exercise. This is greatly influenced by the intensity of the exercise carried out. This proves that cellular adaptation to hypoxia is more stable in aerobic exercise, where the body's metabolism during aerobic exercise is more stable  

scholarly journals AN OBSERVATIONAL CLINICAL STUDY TO EVALUATE SHONITADUSHTI NIDANA IN ASRIGDARA

2021 ◽  
Vol 9 (8) ◽  
pp. 1642-1647
Author(s):  
Silviniya Anitharaj Fernandes ◽  
Prasanna N Mogasale ◽  
Arun Kumar M ◽  
Nagaraj S
Keyword(s):  
Risk Factors ◽  
Abnormal Uterine Bleeding ◽  
Uterine Bleeding ◽  
The Body ◽  
Descriptive Statistics ◽  
Menstrual Blood ◽  
Blood Components ◽  
Disease Manifestation ◽  
Cross Sectional ◽  
Recorded Data

Asrigdara is a disease produced by Dosha Prakopa (vitiation of Dosha) along with Rakta Dushti (vitiation of blood components) primarily in Artavaha Srotas characterised by excessive excretion of menstrual blood where the increased Rakta mix with Raja (menstrual blood) thus, the quantity of Raja increases. It refers to all types of Abnormal Uterine Bleeding (AUB), in which Asrigdara is traditionally expressed as menorrhagia, metrorrhagia, polymenorrhea etc. Up to 1/3rd of women is experiencing abnormal uterine bleeding most commonly in menarche and menopause. Still, the cure of Asrigdara is facing difficulty, which shows that the understanding of Asrigdara is still incomplete, and this motivates to determine further, the other risk factors or other pathology involved in asrigdara. Objective: This calls for an evaluation of the possible Shonitha Dushti Nidana in Asrigdara to identify more risk factors. Methods: In this cross-sectional observational study, 36 subjects diagnosed with Asrigdara were selected. The probable incidence of Nidana (causes), in patients, were assessed through a questionnaire de- veloped for the study. The recorded data were analysed with descriptive statistics. Results: Aharaja Nidanas of Asrigdara acts as Viprakrushta Hetu (remote cause) causes Dhatu Pradooshana (vitiation of tissues) in the body. The Nidana Viruddha Ahara causes Rakta Dushti directly. The Manasika Nidanas such as Krodha (anger) is found to act as Vyanjaka Hetu (weak cause) in the manifestation of Asrigdara. Conclusion: Bahya Hetu (externalfactors) triggers Dosha Kopa or causes Dhatu Pradooshana. In Asrigdara patients, Pitta Pradhana Tridosha and Rakta were vitiated to initiate the disease manifestation. Keywords: Asrigdara, Rakta, Abnormal uterine bleeding, Raja.

scholarly journals Correlation between intakes of carbohydrates, protein, and fat with random blood sugar levels in menopausal women

2019 ◽  
Vol 6 (1) ◽  
pp. 77-80
Author(s):  
Ni Wayan Suniyadewi ◽  
G.N Indraguna Pinatih
Keyword(s):  
Blood Sugar ◽  
Sampling Technique ◽  
Primary Energy ◽  
The Body ◽  
Cross Sectional ◽  
Random Blood Sugar ◽  
Menopausal Women ◽  
The Difference ◽  
Cross Sectional Design ◽  
Sugar Levels

Abstract Objective Carbohydrates, proteins, and fats are energy sources needed by the body for performing daily activities and generating primary energy substances. In women who have undergone menopause, the function of thyroid hormone in their body begins to decline and thus affects the ability of the body to produce energy. The purpose of this study was to determine the correlation between the intakes of carbohydrates, proteins, and fats and random blood sugar levels in menopausal women. Methods This study was a correlational analytical research with a cross-sectional design, which was conducted in 72 menopausal women recruited by the purposive sampling technique. In this study, a 24-hour food recall form was used, and randomized blood sugar levels were measured using a glucometer. The analysis of the data was performed using a Pearson product moment and multiple linear regression. Results Carbohydrates and fats together affected random blood sugar levels with an F-value of 25.810 and a p-value of 0.000. Meanwhile, adjusted R2 showed the value of 0.411, indicating that the difference in the intake of carbohydrates and fats together affected random blood sugar levels by 41.1%. Conclusions Intake of carbohydrates and fats affected random blood sugar levels, whereas the rest were influenced by other factors, and protein intake was unrelated to random blood sugar levels in menopausal women.

scholarly journals RASIONALITAS PENGGUNAAN ANALGESIK DALAM SWAMEDIKASI NYERI DI KOTA DENPASAR

2021 ◽  
Vol 5 (1) ◽  
pp. 66
Author(s):  
Ni Putu Lydya ◽  
Ni Putu Aryati Suryaningsih ◽  
Ni made Umi Kartika Dewi
Keyword(s):  
Low Income ◽  
Therapeutic Index ◽  
Descriptive Statistics ◽  
Self Medication ◽  
Cross Sectional ◽  
Medication Practice ◽  
Consecutive Sampling ◽  
Cross Sectional Design ◽  
The Right ◽  
Analgesic Use

Latar Belakang: Nyeri merupakan keluhan terbanyak yang mendorong masyarakat untuk melakukan praktek swamedikasi. Analgesik efektif dan memiliki indeks terapi yang luas, namun dapat berpotensi untuk menimbulkan efek samping yang serius bahkan ketika digunakan dalam dosis yang tepat. Penelitian ini bertujuan untuk mengetahui gambaran terkait rasionalitas penggunaan analgesik dalam swamedikasi nyeri di Kota Denpasar. Metode: Studi ini menggunakan desain cross-sectional dan melibatkan 196 responden yang dipilih dengan consecutive sampling. Data dikumpulkan dengan menyebarkan kuesioner pada enam apotek di wilayah Kota Denpasar dan dianalisis secara deskriptif. Hasil: Penelitian ini menemukan bahwa 50,5% responden menggunakan analgesik secara tidak rasional dalam praktek swamedikasi nyeri. Mayoritas responden yang menggunakan analgesik dalam swamedikasi nyeri adalah perempuan, usia 17-25 tahun, tingkat pendidikan tinggi, bekerja dan memiliki tingkat pendapatan yang rendah. Kesimpulan: Setengah dari total responden menggunakan analgesik secara tidak rasional dalam praktek swamedikasi nyeri. Tingginya ketidakrasionalan penggunaan analgesik dapat menyebabkan peningkatkan biaya pengobatan dan dapat menimbulkan kondisi yang berbahaya. Kata kunci: Penggunaan analgesik, rasionalitas, swamedikasi AbstractBackground: Pain is the most complaints of illness that encourage communities to use analgesics in self-medication practice. Analgesics are effective and have a broad therapeutic index, but may have potentially serious side effects even when they used in the right dosage. This study aimed to determine the rationality of analgesic use in pain self-medication in Denpasar City. Method: A cross-sectional design was used, and involved 196 respondents selected through consecutive sampling. Data were collected from questionnaire distribution in six pharmacies in Denpasar City and analyzed by using descriptive statistics. Result: This study found that 50,5% respondents used analgesics irrationally in pain self-medication practice. The majority of respondents who used analgesics in pain self-medication were females, aged 17-25 years old, high education level, employed, and had low income. Conclusion: Half of the total respondents used analgesics irrationally in pain self-medication practice. High of irrational analgesic use can increase medical costs and lead to dangerous conditions. Keywords:  Analgesic use, pain, rationality, self-medication

scholarly journals KEJADIAN RESISTENSI INSULIN PADA ANAK OBESITAS USIA 9-12 TAHUN DI KOTA SEMARANG

2017 ◽  
Vol 6 (4) ◽  
pp. 391
Author(s):  
Hana Asnelviana ◽  
Muhammad Sulchan ◽  
Binar Panunggal
Keyword(s):  
Insulin Resistance ◽  
Waist Circumference ◽  
Energy Requirement ◽  
The Body ◽  
Model Assessment ◽  
Height Ratio ◽  
Cross Sectional ◽  
Z Scores ◽  
Waist To Height Ratio ◽  
Cross Sectional Design

Introduction: Obesity is caused by imbalance amount of energy intake and energy requirement of the body. Obesity in children has high risk to become obesity in adult and results in degenerative diseases. In obese children have higher of getting insulin  resistance. This study was aimed to determine insulin resistance in obesity children aged 9-12 years in Semarang.Methods: This study used a cross-sectional design with two groups: height below the median-obesity circumference (TBBM-obesity) and height above the median-obesity (TBAM-obesity). Screening was done in 602 children aged 9-12 years in urban and suburban areas of Semarang. Nutritional status was determined with measurements of z-scores of height-for-age (HAZ) and waist circumference. To define insulin resistance were measured using homeostasis model assessment of insulin resistance (HOMA-IR). Data were then analyzed by Mann-Whitney test and Spearman test.Results: There was found 75% subjects with high HOMA-IR value. HOMA-IR value in TBAM-obesity was 42.5% higher than TBBM-obesity was 32.5% (p= 0,088). Waist circumference and Waist to Height Ratio(WHtR) has a correlation on the increased HOMA-IR value (r= 0.662 p=0.000 and  r= 0.333 p=0.036) and height does not has a correlation on the increased HOMA-IR value (r=0.235; p= 0.144). Conclusion: Insulin resistance from all subject were found 75%. Waist circumference and Waist to Height Ratio(WHtR) has a correlation on the increased HOMA-IR value and height does not has a correlation on the increased HOMA-IR value.

scholarly journals Body odours as a chemosignal in the mother–child relationship: new insights based on an human leucocyte antigen-genotyped family cohort

2020 ◽  
Vol 375 (1800) ◽  
pp. 20190266 ◽  
Author(s):  
Laura Schäfer ◽  
Agnieszka Sorokowska ◽  
Jürgen Sauter ◽  
Alexander H. Schmidt ◽  
Ilona Croy
Keyword(s):  
Genetic Similarity ◽  
Human Leucocyte Antigen ◽  
The Body ◽  
Olfactory Communication ◽  
Developmental Status ◽  
Cross Sectional ◽  
Child Relationship ◽  
Cross Sectional Design ◽  
Maternal Preference ◽  
Westermarck Effect

Mothers are able to identify the body odour (BO) of their own child and prefer this smell above other BOs. It has hence been assumed that the infantile BO functions as a chemosignal promoting targeted parental care. We tested this hypothesis and examined whether children's BOs signal genetic similarity and developmental status to mothers. In addition, we assessed whether BOs facilitate inbreeding avoidance (Westermarck effect). In a cross-sectional design, N = 164 mothers participated with their biological children ( N = 226 children, aged 0–18 years) and evaluated BO probes of their own and four other, sex-matched children. Those varied in age and in genetic similarity, which was assessed by human leucocyte antigen profiling. The study showed not only that mothers identified and preferred their own child's BO, but also that genetic similarity and developmental status are transcribed in BOs. Accordingly, maternal preference of their own child's odour changes throughout development. Our data partly supported the Westermarck effect: mothers' preference of pubertal boys' BOs was negatively related to testosterone for the own son, but not for unfamiliar children. This article is part of the Theo Murphy meeting issue ‘Olfactory communication in humans’.

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