['To determine whether messenger RNA for the gonadal LH/hCG receptor is present in human endometrium with the use of reverse-transcriptase polymerase chain reaction.', 'In vitro experiment.', 'Academic medical center.', 'Premenopausal women who were not receiving hormonally active medications and who were undergoing hysterectomy for uterine leiomyomas, menorrhagia, pelvic pain, or uterine prolapse.', 'Tissue from hysterectomy specimens was processed for RNA and treated with deoxyribonuclease where appropriate, and RNA was reverse-transcribed to complementary DNA.', 'An appropriately sized band after reverse-transcriptase polymerase chain reaction, followed by sequencing to confirm the results.', 'A primer pair that spanned the extracellular domain was unable to amplify receptor complementary DNA from human endometrial tissue. For a primer pair that spanned transmembrane regions 2-6 of the receptor and was contained wholly in exon 11, a 552-base pair fragment was amplified successfully in 19 of 25 human endometrial samples.'] Is messenger ribonucleic acid for the gonadal luteinizing hormone/human chorionic gonadotropin receptor present in human endometrium?