Safwate A, Davicco M J, Dalle M, Barlet J P
Reprod Nutr Dev (1980). 1984;24(4):351-60. doi: 10.1051/rnd:19840402.
Plasma aldosterone, sodium (Na) and potassium (K) concentrations, daily Na and K intakes, and urinary and faecal excretion were measured during the first week of postnatal life in 9 lambs naturally born at term (145 days of gestation) and in 10 lambs delivered by caesarean section on day 145 (6 lambs) or on day 139 (4 lambs) of gestation. Plasma aldosterone, Na and K concentrations showed no significant variation during the experimental period in any group of lambs, and there was no significant difference concerning these parameters among the three groups. Na and K balances were always positive during the experimental period in naturally born lambs. It was negative on days 4 and 6 postdelivery in those delivered by caesarean section on days 145 and 139 of gestation, respectively. This was probably due to the lower daily Na and K intakes measured in these 10 lambs compared to the 9 control lambs: urinary output and urinary Na and K excretion were lower in the two groups of lambs delivered by caesarean section, while Na and K urinary concentrations were not different in any group.
在9只足月自然出生（妊娠145天）的羔羊以及10只在妊娠第145天（6只）或第139天（4只）通过剖宫产出生的羔羊出生后的第一周，测量了血浆醛固酮、钠（Na）和钾（K）浓度、每日Na和K摄入量以及尿液和粪便排泄量。在任何一组羔羊的实验期间，血浆醛固酮、Na和K浓度均无显著变化，并且三组之间在这些参数上没有显著差异。在实验期间，自然出生的羔羊的Na和K平衡始终为正。在妊娠第145天和第139天通过剖宫产出生的羔羊，分别在出生后第4天和第6天其平衡为负。这可能是由于与9只对照羔羊相比，这10只羔羊的每日Na和K摄入量较低：两组剖宫产出生的羔羊的尿量以及尿Na和K排泄量较低，而任何一组的尿Na和K浓度没有差异。
