Fish egg quality is strongly related with the ability of to be fertilized and develop a normal embryo good survival lack abnormalities. Large variations in spawning quantity or impact directly competitiveness sustainability hatcheries, which create an overly large broodstock order satisfy on-growing companies’ demand for undeformed fry. The present study reports, first time relation gilthead se...

Abstract Study question Can we characterize the genetic aspects related to sperm centrosome dysfunction in couples with high embryo aneuploidy that cannot exclusively be attributed oocyte? Summary answer We characterized structural and genomic abnormalities responsible for infertile complex not female partner. What is known already Conventional semen analysis provides only limited information o...

the use of ovarian stimulation for infertility treatment is associated with side effects of ovarian hyperstimulation syndrome (ohss) and potential cancer risk. this is also true in high risk women such as those polycystic with ovary (pco) and polycystic ovarian syndrome (pcos). in vitro maturation (ivm) of oocytes was primarily developed to make ivf safe for women with pco and at high risk of o...

Background: The purpose of this research programme is to improve understanding of the molecular and cellular processes that lead to selection of oocytes before birth. Vastly more oocytes are produced prenatally than can be utilised in reproductive life. Around 70%, of oocytes formed are eliminated before birth and never contribute to the ovarian reserve. After birth, the number of oocytes conti...

Objective: The general patient condition, oocyte and embryo condition and clinical outcomes were studied in patients with a morphologically abnormal zona pellucida (ZP). Methods: The general embryo condition was compared between patients with a morphologically abnormal ZP or a normal ZP. The general embryo conditions in the first and subsequent cycles were compared in patients with a morphologi...

background: human chorionic gonadotropin (hcg) has been used as a replacement for the mid-cycle luteinizing hormone (lh) surge for several years. the recent arrival of recombinant dna technology has made recombinant hcg (rhcg) accessible. objective: to assess efficacy of rhcg compared to urinary hcg (uhcg) for triggering of ovulation and induction of final oocyte maturation in assisted reproduc...

2. The biology of the oocyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 2.1. Oogenesis and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 2.2. Bioelectrical properties of the oocyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 2.3. The oocyte at work...

Oocyte quality is a key limiting factor in female fertility, yet we have a poor understanding of what constitutes oocyte quality or the mechanisms governing it. The ovarian follicular microenvironment and maternal signals, mediated primarily through granulosa cells (GCs) and cumulus cells (CCs), are responsible for nurturing oocyte growth, development and the gradual acquisition of oocyte devel...

Histological analysis was carried out on ovarian development in the picnic seabream, Acanthopagrus berda (Forsskål 1775) caught estuarine waters of Calicut, Kerala, India from January to December 2016. Four developmental phases oocyte were identified viz., oogonia proliferation and transformation into primary oocyte, growth phase, secondary phase maturation these are similar those described for...