Monoclonal antibodies were generated against recombinant follicle-stimulating hormone (rec-FSH) from Japanese eel Anguilla japonica; rec-FSH was produced in Escherichia coli and purified using Ni-NTA Sepharose column chromatography. In support of our recent publication, "Production and characterization of monoclonal antibodies against recombinant tethered follicle-stimulating hormone from Japan...

Biologically active recombinant porcine FSH (rec-pFSH) free from the cognate pituitary glycoprotein hormone LH was produced. It was synthesized by a baculovirus vector-insect cell system using two cDNAs encoding the glycoprotein alpha and FSH beta subunits. Its antigenicity was the same as that of pFSH prepared from the pituitary. Glycosylation of rec-pFSH was shown by tunicamycin treatment but...

This study aimed to develop an antiserum specific to follicle stimulating hormone (FSH), for a wide range of species, free from cross-reactivity against luteinizing hormone. An antiserum against recombinant porcine FSH (rec-pFSH) expressed in insect cells was raised in a rabbit and its specificity was characterized by time-resolved fluoroimmunoassay (TR-FIA) and immunohistochemistry. The titer ...

Equine chorionic gonadotropin (eCG) is a unique molecule that elicits the response characteristics of both follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in other species. Previous studies from this laboratory had demonstrated that recombinant eCG (rec-eCG) from Chinese hamster ovary (CHO-K1) cells exhibited both FSH- and LH-like activity in rat granulosa and Leydig cells. In t...

OBJECTIVE To compare two short protocols for ovarian stimulation in IVF cycles using an antagonist and an agonist short protocol. The outcomes studied were dosis rec FSH needed, days of stimulation, number of oocytes retrieved and pregnancy outcome. METHODS A prospective randomised study design. INCLUSION CRITERIA first or second IVF attempt in women younger than 40 years. In the agonist pr...

Abstract Study question Can controlled ovarian stimulation be performed without LH suppression in the freeze-all era? Summary answer The oocyte and embryo quality patients who were treated with cycles is not affected suppression. What known already a crucial part of fresh IVF cycles. It generally accepted that prolonged or premature exposure to can cause early progesterone secretion abnormal ma...

We have previously described the preparation, purification and partial characterization of recombinant (rec) forms of rat luteinizing hormone (LH) and follicle-stimulating hormone (FSH). In the present study, the special functional features of these hormones were studied further, in vitro and in vivo, and compared with human recLH and recFSH, as well as with human urinary choriongonadotropin (h...

OBJECTIVE(S) To investigate the relationship between premature progesterone (P) rise and serum estradiol (E(2)) levels and the number of follicles in GnRH antagonist/rec-FSH stimulated cycles. STUDY DESIGN Two hundred and seven patients treated by IVF/ICSI at the Centre for Reproductive Medicine of the Dutch-Speaking Brussels Free University were included in this observational study. They rec...

BACKGROUND The purpose of this study was to assess whether, even within a normal FSH range (< or =10 mU/ml), age-specific FSH levels are predictive of ovarian reserve. METHODS Between January 1998 and December 2001, 535 women, undergoing controlled ovarian stimulation with 225 IU of recombinant (rec) FSH and 75 IU of recLH, were included in this retrospective cohort study. Criteria for enrolm...