Circulating immunoglobulins that inhibit the binding of follicle‐stimulating hormone to its receptor: a putative diagnostic role in resistant ovary syndrome?

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Abstract
objective  To evaluate the presence of circulating immunoglobulins that inhibit FSH binding to its receptor (Ig‐FSHR) in patients with premature ovarian failure (POF).design  Non‐randomized study. Blood sampling for determination of circulating immunoglobulins.patients  Two hundred and forty‐seven patients with POF and 60 normally menstruating women (controls).measurements  Circulating immunoglobulins that inhibit FSH binding to its receptor were assessed by FSH‐binding inhibition assay.results  Twenty‐three out of 247 women with POF presented circulating immunoglobulins that inhibit FSH binding to its receptor. These patients had been previously diagnosed as ROS. Sixty control subjects proved negative.conclusion  Determination of the presence of circulating immunoglobulins that inhibit FSH binding to its receptor could be instrumental in diagnosing the gonadotropin resistance ovary syndrome.