Kwa H G, Bulbrook R D, Cleton F, Verstraeten A A, Hayward J L, Wang D Y
Int J Cancer. 1978 Dec;22(6):691-3. doi: 10.1002/ijc.2910220609.
Plasma specimens were obtained in the afternoon (13.30 to 17.29 h) from 668 post-menopausal women and in the evening (17.30 to 20.30 h) from 219 further women. The mean evening plasma prolactin level was significantly higher than that found in the afternoon (p less than 0.0007). Mean afternoon prolactin levels were not related to nulliparity and body weight. In nulliparous obese women the mean of the evening peak prolactin concentrations was double that of comparable women studied in the afternoon (p less than 0.003).
从668名绝经后女性中于下午（13:30至17:29）采集血浆样本，另外从219名女性中于晚上（17:30至20:30）采集血浆样本。晚上血浆催乳素平均水平显著高于下午测得的水平（p<0.0007）。下午催乳素平均水平与未生育及体重无关。在未生育的肥胖女性中，晚上催乳素浓度峰值的平均值是下午所研究的可比女性的两倍（p<0.003）。
