progesterone assay

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Related to progesterone assay: progesterone plasma test

progesterone assay

a blood test that is useful in documenting whether ovulation has occurred and, if so, when. This information may be used to help women with difficulty becoming pregnant. Repeated assays may also be used to monitor the status of the placenta in high-risk pregnancy and progesterone supplementation in patients with an inadequate luteal phase.


a steroid sex hormone that is the principal progestational hormone. Used therapeutically in the treatment of threatened abortion in some species, in estrus control in dogs and cats, and occasionally in treatment of some types of skin diseases.
During the maturation of the ovum, estrogen, the principal female sex hormone, is produced at a high rate. At ovulation estrogen production is sharply reduced and the follicle is replaced by the corpus luteum of which the main function is to produce progesterone. Unless fertilization takes place, the corpus luteum disappears when it has performed its function.
The progesterone produced by the corpus luteum is promptly carried by the blood to the uterus, as was the estrogen that preceded it. Both hormones now work to prepare the uterus for possible conception.
In pregnancy, progesterone acts in a way that protects the embryo and fosters growth of the placenta. By decreasing the frequency of uterine contractions it helps to prevent expulsion of the implanted ovum. It also promotes secretory changes in the mucosa of the uterine tubes, thereby helping to provide nutrition for the fertilized ovum as it travels through the tube on its way to the uterus.
Another function of progesterone is promotion of the development of the mammary glands in preparation for lactation. Prolactin, from the anterior lobe of the pituitary gland, stimulates production of the milk, and progesterone prepares the glands for secretion.

progesterone assay
the estimation of progesterone in milk is used as a pregnancy test.
progesterone-induced lactation
see lactation induction.
progesterone milk test
assay of progesterone in milk used as a pregnancy test.
progesterone plasma test
the original pregnancy test which survives as the milk progesterone test; used in dogs as a guide in predicting the time of ovulation.
progesterone releasing intravaginal device
used as a means of synchronizing estrus in cows and sheep as an aid to structured artificial insemination programs. Called also PRID.
References in periodicals archive ?
The mean data represent typical expected precision performance for the AxSYM Progesterone assay.
In general, there was good correlation between the AxSYM Progesterone assay and all other methods tested (r [greater than or equal to]0.
In worst-case mixed load list modeling scenarios for throughput, the AxSYM Progesterone assay gave a throughput of 57 tests per hour.
In conclusion, our results show that the AxSYM Progesterone assay is sensitive, specific, and highly precise and gives results that correlate and agree well with those by a manual RIA method.
Single luteal phase serum progesterone assay as an indicator of ovulation.
DPC changed the antibody used in their progesterone assay during the course of this study.
The Immuno 1 progesterone assay has been compared with the old and new DPC progesterone assays by using 185 and 48 samples, respectively.
For the Immuno 1 progesterone assay, the minimum detectable concentration was estimated with 47 reaction rates of the SETpoint progesterone calibrator 1 at 0.
The Immuno 1 progesterone assay was also compared with the new DPC progesterone method (Fig.
The performance of the Immuno 1 progesterone assay is also better than other reported automated progesterone assays [27-31].
For the progesterone assay, the minimum detectable concentration is also equivalent to other commercial automated progesterone assays [27,28, 30, 31].

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