Bell R
Br J Obstet Gynaecol. 1983 Oct;90(10):888-91. doi: 10.1111/j.1471-0528.1983.tb06758.x.
Plasma levels of oestradiol and progesterone were measured in patients with a history of preterm labour but otherwise uncomplicated pregnancies who subsequently had a preterm labour. The plasma hormone levels were found to lie within the normal range, suggesting that the peripheral levels of these hormones do not play a role in the onset of labour before term.
对有早产史但妊娠过程无其他并发症且随后发生早产的患者,测定其血浆雌二醇和孕酮水平。发现血浆激素水平在正常范围内,这表明这些激素的外周水平在足月前分娩的发动过程中不起作用。