Table 1.

Details of animals studied

Number of animals = 9	Mean ± s.e.m.
Age at surgery	116.8 ± 1.5 dGA
Age at data collection for data on the day before delivery	138.0 ± 0.7 dGA
Age at 48 h of recording used for 24 h rhythm analysis (mid-period)	140.2 ± 0.5 dGA
Age at spontaneous onset of labour (SOL)	143.7 ± 0.7 dGA
Age at end of study	144.7 ± 0.7 dGA
Duration from SOL to end of study	16.9 ± 1.5 h
Fetal weight at end of study	4.1 ± 0.4 kg
Mean fetal pH during analysis period (before SOL)	7.36 ± 0.01
Mean fetal PO2during analysis period (before SOL)	21.8 ± 0.4 mmHg
Mean fetal pH during analysis period (after SOL)	7.36 ± 0.04
Mean fetal PO2 during analysis period (after SOL)	18.5 ± 1.5 mmHg

dGA, days of gestational age.