Warning: Undefined array key "mm" in /www/wwwroot/www.ai-bt.com/si.php on line 10 Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/www.ai-bt.com/si.php on line 10 Nursing frequency, gonadal function, and birth spacing among !Kung hunter-gatherers.

Literature DB >> 7352291

Nursing frequency, gonadal function, and birth spacing among !Kung hunter-gatherers.

Abstract

Mothers among !Kung hunter-gatherers nurse briefly and frequently, with brief intervals between nursing bouts (mean +/- standard error, 13.19 +/- 1.28 minutes). The low levels of 17 beta-estradiol and progesterone in the serum of the mother are correlated with infant's age and with interbout interval, but not with total nursing time. Maternal gonadal function is apparently suppressed by a timing-dependent, prolactin-mediated effect of breast stimulation. Interbout interval may be a key variable in lactation infertility. If so, it solves the puzzle of !Kung birth spacing.

Entities: Chemical Disease Gene Species

Mesh：

Substances：
Progesterone
Estradiol

Year: 1980 PMID： 7352291 DOI： 10.1126/science.7352291

Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728

Keyword Cloud
Cited

16 in total

Review 1. What a drop can do: dried blood spots as a minimally invasive method for integrating biomarkers into population-based research.

Authors: Thomas W McDade; Sharon Williams; J Josh Snodgrass
Journal: Demography Date: 2007-11

9. Parent-infant cosleeping: the appropriate context for the study of infant sleep and implications for sudden infant death syndrome (SIDS) research.

Authors: S Mosko; J McKenna; M Dickel; L Hunt
Journal: J Behav Med Date: 1993-12

10. Age at reproductive debut: Developmental predictors and consequences for lactation, infant mass, and subsequent reproduction in rhesus macaques (Macaca mulatta).

Authors: Florent Pittet; Crystal Johnson; Katie Hinde
Journal: Am J Phys Anthropol Date: 2017-09-12 Impact factor: 2.868

Nursing frequency, gonadal function, and birth spacing among !Kung hunter-gatherers.

Review 1. What a drop can do: dried blood spots as a minimally invasive method for integrating biomarkers into population-based research.

2. Longitudinal analysis of the effects of infant-feeding practices on postpartum amenorrhea.

3. Fat distribution patterns in young amenorrheic females.

Review 4. Pheromones Regulating Reproduction in Subsocial Beetles: Insights with References to Eusocial Insects.

5. Cultural significance and physiological manifestations of menopause. A biocultural analysis.

6. Effect of supplementary food on suckling patterns and ovarian activity during lactation.

7. Interactions between metabolic and reproductive functions in the resumption of postpartum fecundity.

8. A review: dietary restrictions on hunter-gatherer women and the implications for fertility and infant mortality.

9. Parent-infant cosleeping: the appropriate context for the study of infant sleep and implications for sudden infant death syndrome (SIDS) research.

10. Age at reproductive debut: Developmental predictors and consequences for lactation, infant mass, and subsequent reproduction in rhesus macaques (Macaca mulatta).