van der Walt L A, Wilmsen E N, Jenkins T
J Clin Endocrinol Metab. 1978 Apr;46(4):658-63. doi: 10.1210/jcem-46-4-658.
Endocrine parameters were assayed in a San ("Bushman") population of Botswana in an attempt to correlate hormonal secretion and body morphology. Serum levels of gonadotrophins and gonadal steroids were measured by employing radioimmune methods. No evidence for elevated estrogens could be found and males showed endocrine levels comparable with European and South African Negro values. Females have suppressed circulating levels of gonadal steroids and little corpus luteum function. A mechanism by which the ovaries may be suppressed, thereby limiting conception to times of high nutrition, may exist in the San. This hypothesis may have a bearing on the observation that births reach peak levels during March and April.
为了将激素分泌与身体形态联系起来，对博茨瓦纳的一个桑族（“布须曼人”）群体的内分泌参数进行了测定。采用放射免疫法测定促性腺激素和性腺类固醇的血清水平。未发现雌激素升高的证据，男性的内分泌水平与欧洲和南非黑人的值相当。女性的性腺类固醇循环水平受到抑制，黄体功能较弱。桑族可能存在一种抑制卵巢的机制，从而将受孕限制在营养丰富的时期。这一假设可能与3月和4月出生人数达到峰值的观察结果有关。
