Fig. 2

Concentrations of agmatine and polyamines in maternal plasma. a Agmatine was more abundant than any of the polyamines in maternal plasma (P < 0.001). b There was not a significant day × treatment interaction for concentrations of agmatine in maternal plasma. c Concentrations of spermidine in maternal plasma were affected by a day × treatment interaction (P < 0.05). d Concentrations of spermine in maternal plasma were affected by a day × treatment interaction (P < 0.001). e Concentrations of putrescine in maternal plasma were not affected by a day × treatment interaction. f P4-treated ewes had lower concentrations of spermidine in maternal plasma than CO-treated ewes (P < 0.05). g Ewes on day 12 of gestation had decreased amounts of spermidine in plasma than ewes on day 9 of gestation. h P4-treated ewes had greater amounts of spermine in their plasma than CO-treated ewes (P < 0.05). i Ewes on day 12 of pregnancy had decreased amounts of spermine in maternal plasma than ewes on day 9 of pregnancy (P < 0.01). Only plasma from ewes which were considered pregnant with normally developed conceptuses were utilized for these analyses