Norman R J, Joubert S M
Br J Obstet Gynaecol. 1985 Mar;92(3):216-9. doi: 10.1111/j.1471-0528.1985.tb01085.x.
Amniotic fluid concentrations of immunoreactive oestrogens and progesterone were measured at the time of caesarean section in 32 twin pregnancies; 25 women had an elective section and seven were in labour at the time of operation. No significant differences between concentrations in the amniotic fluid of the first and second twin were found in respect of conjugated and unconjugated oestrone, oestradiol, oestriol, oestetrol and unconjugated progesterone either before or during labour. It is unlikely that changes in oestrogens or progesterone in the amniotic fluid are responsible for the selective changes seen in prostaglandins and fetal adrenal steroid during labour in the first twin.
在32例双胎妊娠剖宫产时测量了羊水免疫反应性雌激素和孕酮的浓度；25名妇女为择期剖宫产，7名在手术时已临产。无论在临产前还是产程中，在结合型和非结合型雌酮、雌二醇、雌三醇、雌四醇及非结合型孕酮方面，第一和第二胎儿羊水中的浓度均未发现显著差异。羊水雌激素或孕酮的变化不太可能是导致第一胎儿产程中前列腺素和胎儿肾上腺类固醇出现选择性变化的原因。
