Avoiding transmitting identified mutations to offspring using preimplantation genetic diagnosis

Area of Science:

• Reproductive Medicine
• Medical Genetics

Background:

• Preimplantation genetic diagnosis (PGD) is a technique used to screen embryos for genetic disorders before in vitro fertilization (IVF).
• It aims to reduce the risk of transmitting inherited mutations to offspring.

Observation:

• A couple, the woman with spondyloepiphyseal dysplasia congenita and the man with Marfan syndrome, underwent IVF with PGD.
• Two embryos unaffected by either autosomal dominant single-gene disorder were selected for transfer to a gestational carrier.

Findings:

• The couple faced a 75% statistical risk of producing affected embryos.
• The PGD process successfully identified and selected two mutation-negative embryos, leading to the birth of healthy twins.

Implications:

• This case demonstrates the successful application of PGD for couples with multiple, distinct autosomal dominant conditions.
• It expands the utility of PGD in complex genetic scenarios, offering reproductive options for high-risk families.