Conditions: Obesity
Allocation: NON_RANDOMIZED | Intervention model: PARALLEL
Enrollment: 70
Healthy volunteers: no

Brief summary:
The aim of the present study is to determine, whether clinical efficacy of 150 mcg of Corifollitropin alfa is the same in normal weighing and obese women. Furthermore, investigators want to determine whether oocytes retrieved from normal weighing and obese women, after COH using 150 mcg of Corifollitropin alfa, are of same quality on the molecular level.

Detailed description:
The dosage of Corifollitropin alfa used for controlled ovarian hyperstimulation (COH) is adjusted according to the patient's body weight. Meaning, in women with a body weight ≤ 60 kg, a single dose of 100 mcg of Corifollitropin alfa is administered for COH and in women with a body weight \> 60 kg, a single dose of 150 micrograms of Corifollitropin alfa is administered for COH. These two protocols are comparable in safety and efficacy of follicular stimulation.

On the other hand, knowledge about the clinical efficacy of 150 mcg of Corifollitropin alfa in obese women (BMI\>30 kg/m2) is lacking.

Cumulus cells (CC) surround the oocyte and bi-directional communication between oocyte and CC is necessary for the development of mature and quality oocytes. It has been proposed, that analysis of genes, expressed in CC, can serve as an objective indicator of the oocyte's maturity and developmental potential. Expression of genes in CC as hyaluronan synthase 2 (HAS2), follicle-stimulating hormone receptor (FSHR), versican (VCAN), progesterone receptor (PR), vascular endothelial growth factor C (VEGFC), serine protease inhibitor E2 (SERPINE2), glutathione peroxidase (GPX3), pentraxin 3(PTX3) was reported to correlate with oocyte maturity and developmental potential.

The effect of Corifollitropin alfa on expression of these genes however, is unknown.

Arms:
arm 1: Elonva 150 mcg intramuscular daily obese arm 2: Elonva 100 mcg intramuscular daily normal weight

Interventions: intervention 1: Elonva
Intervention descriptions: intervention 1: 20 obese women will be the study group and 20 normal weighing women will be the control group. Both groups will receive 150 mcg of Elonva for controlled ovarian hyperstimulation (COH). Gonadotropin-releasing hormone (GnRH) antagonist will be used to prevent premature luteinizing hormone (LH) surge. Additional daily doses of 200 IU of recombinant follicle stimulating hormone (rFSH) will be used if necessary. Human chorionic gonadotropin (hCG) will be used for oocyte maturation. 2 mature follicles will be aspirated separately in each patient. Cumulus cell (CC) samples will be collected and stored on -80 oC for subsequent analysis. Clinical and molecular parameters of IVF success will be assessed and compared between the groups.

The exclusion criteria will be: polycystic ovary syndrome, severely abnormal sperm parameters, and age \> 38 years.

Protocol document: