[Use of a technic of bioluminescence for determining estrogens and LH during static and dynamic study of the ovary]

Estrogens and LH are necessary among other assays for ovulation diagnostic and ovarian monitoring during stimulations. They can be both measured with a method based on a bioluminescent reaction. This method measures, with a standard luminometer, the reduced NAD produced and accumulated by the reaction of two dehydrogenase enzymes: the estradiol dehydrogenase for direct assay of estrogens (estrone + estradiol), the glucose-6-phosphate dehydrogenase for gonadotrophin determination. These techniques can be applied to all biological fluids. They are simple and straightforward, do not need extraction and can be automated. Urinary assays are very useful in clinical practice to appreciate ovarian function, either during a spontaneous cycle or under stimulation, and are mandatory to decide the timing of hCG injection. The reported studies can be listed as follows: determination of preovulatory LH rise (LH greater than 10 Ul/g of creatinine) prior to embryo transfer after cryopreservation and thawing, detection of LH surges during ovarian stimulation, either premature surges causing premature luteinization, either normal surges when follicular maturation is adequate (296 cycles), confirmation of pituitary desensitization when using GnRH agonists (43 cycles), study of the initial stimulatory effect of GnRH agonists (13 patients). This effect can be responsible for the inadequate results obtained with the so-called "short protocol" in this experience when compared with the "long protocol" in the author's experience with compared with the "long protocol" (8 p. cent pregnancy rate per stimulation cycle versus 20 p. cent respectively, intrafollicular LH in 129 follicular fluids (86 with GnRH agonists and 43 without) has no correlation with the fecundability of the ovum. These results lead to extend bioluminescent techniques to the study of other parameters, and in particular FSH.