ABSTRACT
The study explores the perceived causes of change in sexual risk behaviour among Nigerian adolescents over the past years. By embedding the results into a theoretical context, the study aims to further develop interventions targeting adolescent sexual health. To do so, 23 semi-structured interviews are conducted through the mobile-instant-messaging tool WhatsApp. The interview sample consists of both female and male adolescents and adults from different regions in Nigeria. The interviews are conducted as simultaneous chats and analysed based on the qualitative content analysis approach. Respondents perceive a multitude of different factors as causes of change in sexual risk behaviour among Nigerian adolescents. They can be categorised into (1) individual actors, (2) structural factors, and (3) socio-cultural factors. Interrelations between the different factors can partly be observed. The other factors are mostly modifiable and can therefore contribute to reducing adolescent SRB.
Subject(s)
Sexual Behavior , Sexual Maturation , Social Environment , Behavior Therapy , Prevalence , Socioeconomic Factors , Surveys and Questionnaires , Culture , Social Media , Sexual HealthABSTRACT
Use of Tanner stages i.e. Sexual Maturity Rating; (SMR); in evaluation of sexual maturity has gained widespread acceptance. Tanner staging assesses pubic hair growth and increase in genital sizes; the latter of which is best reflected by the increase in testicular size. Testicular volume increases is thought to be the most sensitive clinical indication of onset and progress of puberty. It has been argued that the initial stage of sexual development may be missed if testicular volume is not assessed. We explored usefulness of testicular volume estimation for assessing sexual maturity among adolescent male sickle cell anaemia (SCA) patients. Methods: We conducted a cross-sectional case-control study evaluating sexual maturation of male patients with sickle cell anaemia and those with HbAA genotype. Tanner staging and testicular volume assessment were both used as models for evaluating stages of sexual maturation among SCA patients and their normal counterparts matched for age and socioeconomic status. Results: SCA patients demonstrated delay in onset and completion of sexual maturation. Testicular volumes (TV) of subjects were smaller than those of controls but when related to stages of sexual maturity; there was no statistically significant difference between both groups. The correlation coefficients between various stages of sexual maturity and TV suggest strong associations. Conclusion: Testicular volume increase is shown as a reasonably good predictor of onset and progression of sexual maturity in both SCA subjects and their healthy controls
Subject(s)
Adolescent , Anemia , Sexual Maturation , TestisABSTRACT
La morphometrie; l'echelle de maturite et le cycle sexuel des crabes nageurs Callinectes amnicola de Rochebrune; 1883 (Decapode-Portunidae) de la lagune Aby ont ete etudiees de 2003 a 2004. Les resultats montrent que : Chez les crabes males; le premier groupe comprend des largeurs de carapace comprise entre 3 et 9 cm. Le deuxieme comprend des largeurs de carapace comprises entre 10 et 16 cm. Les parametres de l'abdomen sont fortement correles et ces correlation varient enter 0;62 et 0;98. Concernant les crabes femelles; le premier comprend des largeurs de carapace comprises entre 2 et 8 cm et le deuxieme; entre 9 et 14 cm. Les correlations des parametres de l'abdomen sont fortes et oscillent entre 0;67 et 0;98. Chez les crabes males et femelles du complexe lagunaire Aby-Tendo-Ehy; on note cinq (5) stades de developpement. Cette echelle s'appuie sur la liberation de l'abdomen; le developpement des gonades; la presence des spermatophores et des caracteres sexuels secondaires; enfin l'analyse morphometrique. Au cours du cycle sexuel etudie chez les crabes males; ont constate que le declenchement et developpement des gonades ont lieu dans les eaux dessalees. Ces dernieres sont aussi le lieu du declenchement de la vitellogenese chez les femelles. Par contre; la maturation se deroule dans les eaux salees et cela selon un rythme saisonnier
Subject(s)
Crustacea , Sexual Maturation , ShellfishABSTRACT
La sexualite occupe une place centrale a l'adolescence. Ni enfant; ni adulte; l'adolescent voit son corps se transformer; il ressent de nouveaux besoins et de desirs. La maturite des organes genitaux; acquise a la puberte et leur fonctionnement marque par la premiere ejaculation; les premieres regles ont un impact tres important. Il s'agit pour l'adolescent d'integrer ces changements corporels en meme temps que les nouvelles conditions externes (socio-culturelles) et internes (transformations cognitives; affectives et rationnelles) pour trouver une organisation sexuelle definitive integree a sa personnalite