Small Molecule LCDM and GV Oocyte

Peking University People's Hospital250 enrolled

Overview

Immature eggs obtained during the oocyte retrieval cycle are discarded as medical waste because they cannot complete fertilization, but each egg is important for people with poor clinical outcome. In vitro maturation (IVM) technique allows immature GV and MI eggs to mature in vitro, offering hope for this population to increase the clinical pregnancy rate in a single oocyte retrieval cycle. However, the clinical effectiveness of IVM clinical application is still very low, especially the utilization rate of GV eggs is extremely low. The cocktail of small molecules includes four chemical components of LCDM, which are related to cell proliferation, in vitro maturation of eggs, and protection of cells from oxidative stress. Our preliminary experiments confirmed that the addition of a certain concentration of LCDM in the culture medium can significantly improve the in vitro maturation rate and embryo utilization rate of immature GV eggs. In this study, LCDM immature oocyte culture system was used to carry out in vitro maturation culture of GV oocytes, and combined with oocyte activation technology to verify the clinical safety of LCDM in vitro culture system by observing the in vitro maturation rate, fertilization rate and embryo development results of GV oocytes, so as to provide laboratory data for clinical application of GV oocytes in special patients.

Study Type

OBSERVATIONAL

Enrollment

250

Conditions

Assisted Reproduction

Interventions

Outcomes

Primary Outcomes

Number of GV oocyte maturation rate at 48 hours

The GV oocyte maturation rate was defined as the number of MII oocytes which were come from GV oocyte during in vitro maturation. The more MII oocytes, the higher the in vitro maturation rate of the patient's oocytes.

Time frame: 48 hours

Change from the quality of MII oocytes between the two groups at 48 hours

The two groups of mature MII eggs were compared, and the chromosome ploidy, spindle integrity and cortical particle distribution were observed respectively to determine the quality of MII eggs in the two groups. The evaluation methods include that the chromosomes of normal mature oocytes are aneuploid, the spindles are arranged orderly, and the cortical particles are distributed in the cortical area.