Laboratory methods of equine pregnancy diagnosis.

The research article discusses different laboratory methods used for identifying pregnancy in horses, their accuracies, costs, and test durations, and looks into modifying an old method by quantifying the utero-ovarian response in the immature female mouse to yield accurate numerical results.

Reliable pregnancy diagnosis methods in the mare

• The article examines current methods of diagnosing pregnancy in horses, where it emphasizes that rectal examination is a reliable technique.
• It also discusses that quick detection of pregnant mare serum gonadotrophin (PMSG) is possible through readily available test kits.

Demand for independent laboratory services

• The study acknowledges the high demand from practitioners for independent laboratory services, notably during the gestational phase when placental gonadotrophin concentrations in the blood are high.
• Initial endeavors to offer a service utilizing the agar gel diffusion test were unsuccessful, leading to the exploration of alternative methods.

Requirements for potential methods

• Researchers outlined the requirements of an ideal alternative technique, which includes accuracy, sensitivity, applicability to the best request period, elimination of subjective interpretation, and a low inconclusive rate.
• Cost-efficiency, practicality, and test duration were identified as additional considerations.

Assessment of various tests

• The article sums up the different tests currently available and assesses their published accuracies.
• It reflects on the need to reverse the prevalent shift from biological to immunological techniques.

Modification of the Cole and Hart method

• It was recommended to modify the test developed by Cole and Hart in 1930 that led to the discovery of PMSG.
• The modification involves quantifying the utero-ovarian response in the immature female mouse to produce a numerical result, thus simplifying the interpretation.
• The article explains the rationale for this suggestion, provides a detailed method description, and evaluates its accuracy, all indicating that the method met the previously defined requirements.