Kramer Karen L, Lancaster Jane B
Department of Human Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
Ann Hum Biol. 2010 Sep-Oct;37(5):613-28. doi: 10.3109/03014460903563434.
Teen motherhood is the prevalent childbearing pattern in most traditional populations. Yet early motherhood is associated with negative biological and social outcomes in the developed world. We review the teen pregnancy literature in light of this discrepancy, emphasizing two core debates. The first debate centers on whether teens have poor pregnancy outcomes compared to older women, and whether negative outcomes are biologically based. Second, we consider the debate over the confounding effects of socio-economic conditions associated with being young. When teens are considered as a group, results are inconsistent across studies. When teens are disaggregated by age, the strongest finding across studies is that biological risk is concentrated in only the youngest of mothers. Negative consequences are associated with teen motherhood not because of chronological age per se, but because of relative developmental maturity and the availability of non-maternal support. In most traditional societies as well as in some sectors of developed societies, teen motherhood occurs within the context of extended kin networks and is subsidized through reliable economic and childcare assistance. Child-rearing practices, rather than pregnancy per se, may explain much of the discrepancy in the prevalence, success and attitudes toward teen motherhood in traditional and developed societies.
少女母亲是大多数传统人群中普遍存在的生育模式。然而,在发达国家,早育与负面的生理和社会后果相关。鉴于这种差异,我们回顾了青少年怀孕相关文献,重点关注两个核心争论。第一个争论集中在与年长女性相比,青少年的怀孕结果是否较差,以及负面结果是否基于生理因素。其次,我们考虑关于与年轻相关的社会经济状况的混杂效应的争论。当将青少年视为一个群体时,各研究结果并不一致。当按年龄对青少年进行细分时,各研究中最有力的发现是,生理风险仅集中在最年轻的母亲群体中。与少女母亲身份相关的负面后果并非因为年龄本身,而是因为相对发育成熟度以及非母亲支持的可得性。在大多数传统社会以及发达社会的一些领域,少女母亲身份出现在大家庭网络的背景下,并通过可靠的经济和育儿援助得到补贴。育儿方式,而非怀孕本身,可能很大程度上解释了传统社会和发达社会在少女母亲身份的发生率、成功率及态度方面的差异。