Follicular fluid obtained from medium or large bovine ovarian follicles inhibited ovarian luteinizing hormone/human chorionic gonadotropin sensitive adenylate cyclase in a dose-dependent manner (150'3 mg follicular fluid protein/ml). The inhibitory activity was excluded by Sephadex G-10 and was fully retained following treatment with charcoal. Fluoride-stimulated enzyme activity was not inhibit...

The aim of this study was to investigate 2 quantification criteria to evaluate the developmental condition of follicles cohort and clarify their impacts upon the determining of human chorionic gonadotropin trigger timing and the reproductive outcome: the proportion of mature follicles in growing follicles cohort on the day of human chorionic gonadotropin trigger and the peak estradiol level per...

OBJECTIVE The previously held dictum that elective abortion before 6 weeks' gestation carried greater risks than a later procedure was challenged by this protocol. STUDY DESIGN This study evaluated a protocol for abortion before the customary 6 weeks' gestation. Patients willing to return to the clinic within 72 hours were given the option of elective abortion even when no gestational sac cou...

Background and Aims: Some nanoparticles can be used in immunoassays to increase sensitivity. This study aimed to evaluate a novel nano-immunoassay based on bovine serum albumin nanoparticles (BSA NPs). Materials and methods: At first, the nanostructure was synthesized, and then applied as a tag in the nano-immunoassay. Then the concentration of β-subunit of human chorionic gonadotropin ...

Human oocytes were collected by laparoscopy and fertilized and cultured in vitro. Human chorionic gonadotropin was detected in the medium surrounding two embryos cultured for more than 7 days after fertilization.

BACKGROUND Several markers were studied previously in order to predict the pregnancy outcome of assisted reproductive techniques; however, serum beta human chorionic gonadotropin was found to be the most predictive marker. AIMS To evaluate the value of serum beta human chorionic gonadotropin levels in discriminating biochemical and clinical pregnancies 12 days after embryo transfer, while det...