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  • Title: The stability and short-term fluctuation in serum oxytocinase activity in pregnancy.
    Author: Edebiri AA, Mack DS, McDonald DJ, Philips J.
    Journal: Int J Gynaecol Obstet; 1989 Apr; 28(4):331-5. PubMed ID: 2565254.
    Abstract:
    Maternal serum samples obtained from 123 normal pregnant women between 28 and 40 weeks gestation were analysed for oxytocinase (EC 3.4.11.3) activity using s-benzyl-1-cysteine-4-nitroanilide as substrate. Oxytocinase activity was found to be stable at varying temperatures, with a mean co-efficient of variation of 5.0%. The short-term fluctuation of oxytocinase activity had a mean coefficient of variation of 3.6%. There is no suggestion of a "pulsatile" release of oxytocinae from its placental origin.
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