Chromosomal polymorphisms associated with reproductive outcomes after IVF-ET

Area of Science:

• Human Genetics
• Reproductive Medicine
• Infertility Research

Background:

• Chromosomal polymorphisms are variations in chromosome structure that can affect fertility.
• Infertility affects a significant portion of the population, necessitating advanced reproductive technologies like in vitro fertilization (IVF).
• Understanding the impact of specific chromosomal polymorphisms on IVF outcomes is crucial for personalized patient care.

Purpose of the Study:

• To investigate the influence of specific chromosomal polymorphisms (1/9/16qh^+/-, D/G group, and inv(9)) on the success rates of IVF and embryo transfer (ET).
• To determine if different types of chromosomal variations have distinct effects on key IVF metrics.

Main Methods:

• A cohort of 1335 infertile couples undergoing IVF/ICSI was analyzed.
• The study correlated three types of chromosomal polymorphisms with IVF/ICSI outcomes.
• Key metrics analyzed included fertilization, cleavage, embryo quality, pregnancy, implantation, and miscarriage rates.

Main Results:

• The inv(9) and D/G group polymorphisms were associated with significantly lower 2PN cleavage rates in women undergoing IVF.
• The inv(9) polymorphism increased early miscarriage rates in both IVF and ICSI procedures, regardless of carrier sex.
• For D/G groups, ICSI improved implantation and clinical pregnancy rates.
• The 1/9/16qh^+/- polymorphism did not demonstrate adverse effects on IVF outcomes.

Conclusions:

• Chromosome karyotype analysis is essential for patients undergoing IVF.
• Genetic counseling should be individualized based on the specific type of chromosomal polymorphism identified.
• Identifying specific polymorphisms like inv(9) and D/G groups can guide treatment strategies and improve IVF success rates.