Harrison R F
Fertil Steril. 1978 May;29(5):532-34. doi: 10.1016/s0015-0282(16)43279-6.
Four hundred cervicovaginal artificial inseminations using husband's semen were carried out for a variety of clinical indications. Before insemination, to one-half of the samples caffeine was added to a final concentration of 6 mM. Although the motility of the spermatozoa was enhanced in each case, no pregnancies were achieved. Of the four pregnancies in the series, only one could be attributed to artificial insemination.
出于各种临床指征，使用丈夫的精液进行了400次宫颈阴道人工授精。在授精前，向一半样本中加入咖啡因，使其终浓度达到6 mM。尽管每种情况下精子的活力都有所增强，但均未成功受孕。在该系列的4次妊娠中，只有1次可归因于人工授精。
