Biological Determinants and Influences Affecting Adolescent Pregnancy

Cherry, Andrew L.

doi:10.1007/978-1-4899-8026-7_2

Cited by 2 publications

(11 citation statements)

References 39 publications

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“…There are obvious challenges in measuring most of these physiological changes; however, the commencement of menstruation, otherwise known as menarche, is accepted as the beginning of maturity among girls [2, 3]. Although the onset of menstruation is the last of all the secondary indicators of puberty as it usually starts about 27 months after breast budding and 18 months after pubic hair growth [4, 5], it nevertheless indicates sexual maturity in girls. Menarche is highly correlated with breast budding and is therefore adjudged to be an indicator of the early onset of puberty [4].…”

Section: Introductionmentioning

confidence: 99%

“…Although the onset of menstruation is the last of all the secondary indicators of puberty as it usually starts about 27 months after breast budding and 18 months after pubic hair growth [4, 5], it nevertheless indicates sexual maturity in girls. Menarche is highly correlated with breast budding and is therefore adjudged to be an indicator of the early onset of puberty [4]. Literature is replete with the significance of onset of menstruation in a girl's life [5, 6] and its timely commencement is an indicator that all other puberty and reproductive changes are simultaneously taking place.…”

Section: Introductionmentioning

confidence: 99%

“…The underlying causes have not been completely unravelled [3]. For instance, a cross-sectional study across 13 countries by Cherry et al stated that while menarcheal age has decreased steadily by 0·34 year per decade among rural girls, a decrease of 0·73 year per decade has been established among urban girls and 0·46 year per decade for the combined groups since the 1940s [4]. A systematic review of studies on adolescent pregnancy and its contributing factors showed a global variation in mean estimates of age at menarche.…”

Section: Introductionmentioning

confidence: 99%

“…A systematic review of studies on adolescent pregnancy and its contributing factors showed a global variation in mean estimates of age at menarche. The mean ages at menarche were: Argentina (12.6), Philippines (13.6), Australia (13.0), Portugal (12.5), Canada (12.7), Russia (13.0), Chile (13.0), South Africa (12.5), Columbia (12.8), South Korea (13.9), Germany (12.8), Spain (12.3), India (14.3), Sweden (13.1), Indonesia (13.0), Switzerland (13.0), Ireland (13.5), Turkey (13.3), Japan (12.5), USA (12.5), Netherlands (13.2), Uganda (13.4), Nicaragua (14.0), United Kingdom (12.9), Nigeria (13.7) and Vietnam (12.7) [4]. Accessibility to more or better nutritional intakes to urban girls was found to be responsible for this difference.…”

Section: Introductionmentioning

confidence: 99%

“…Literature has posited that place of residence, education and socio-economic status influence age at menarche [1, 18]. Also, mother's menarcheal age, body mass index (BMI), family size, ethnicity and age at data collection were found to be significantly associated with age at menarche [1, 4, 16, 18]. For instance, Wu et al in a study among US girls, found that the mean age at onset of menarche was 12·1 years for black girls; 12·2 years for Mexican-American girls; and 12·7 years for white girls [19].…”

Section: Introductionmentioning

confidence: 99%

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Parametric survival analysis of menarche onset timing among Nigerian girls

Fagbamigbe

Obiyan

Fawole

2018

Heliyon

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BackgroundThis study was a response to the dearth of information on the timing of menarche in low-income countries, and the need to update knowledge on the condition. It thereby enables the provision of adequate support to young girls during menarche. The study determined the timing and range of onset of menarche and identified the factors influencing the timing.MethodsWe used data on girls' sexual and reproductive processes from a nationally representative population survey of girls aged 15–24 years in Nigeria. Descriptive statistics, and survival analysis techniques were used for data analysis at p = 0·05.FindingA quarter of the respondents (26%) had commenced menstruation by age 12. Almost all, (90%) had experienced menstruation by age 17. Girls aged 20–24 years reported later menarche (time ratio 1·066, 95% CI: 1·045-1·087) compared to those aged 15–19 years. An increase of respondents age by one year resulted in 0·8% delay in onset timing. Significant differences were also found in the zone of residence among the sampled population. Compared with girls from the South East, the timing of menstruation was generally delayed among the girls from South-South by 5%, North Central by 9%, South West by 10%, North East by 16% and 17% among girls from the North West.InterpretationThere was a wide range in menarcheal age in Nigerian girls with a peak at 13–14 years and the possibility of a secular trend in the timing of onset. Early family life education is recommended.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parametric survival analysis of menarche onset timing among Nigerian girls

Fagbamigbe

Obiyan

Fawole

2018

Heliyon

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A qualitative analysis of adolescent motherhood within the broader family context in Peru

et al. 2023

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ObjectiveThe purpose of this study was to characterize the impact of adolescent pregnancy on families and describe the needs of adolescent mothers and their infants in order to assess the need for intervention and identify potential intervention targets.BackgroundAdolescent mothers and their offspring face an increased risk of mental health problems. Adolescent mothers and their families also face significant resource constraints; 95% live in low‐ and middle‐income countries (LMICs). Cost‐effective interventions are needed to improve outcomes for this vulnerable group.MethodThis qualitative study conducted in Lima, Peru, consisted of four clinician focus groups and 18 in‐depth interviews with adolescent mothers and their family members. Data were coded thematically, and direct content analysis was employed.ResultsThe study identified the following issues facing adolescent parents: the transition to parenthood, the need for family support, difficulty accessing support, the difficulty for family members of providing support, and ideas about responsibility and adolescent autonomy.ConclusionOverall, these findings demonstrate the need for interventions that engage families and address barriers to accessing support, including relationship conflict and differing beliefs about responsibility and autonomy.ImplicationsInterventions are needed for adolescent mothers in LMICs that mobilize family support. Clinicians who care for these patients need to be aware of the family context and the resources available where they practice.

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Biological Determinants and Influences Affecting Adolescent Pregnancy

Cited by 2 publications

References 39 publications

Parametric survival analysis of menarche onset timing among Nigerian girls

Parametric survival analysis of menarche onset timing among Nigerian girls

A qualitative analysis of adolescent motherhood within the broader family context in Peru

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