Which ART component involves testing embryos for genetic conditions before transfer?

Which ART component involves testing embryos for genetic conditions before transfer?

• A. GIFT
• B. Embryo biopsy
• C. Preimplantation genetic testing (PGT)
• D. Oocyte donation

Answer: (C)

Testing embryos for genetic conditions before transfer is done through Preimplantation Genetic Testing. This approach evaluates embryos at the cellular level to detect chromosomal abnormalities or specific gene disorders before deciding which embryo to transfer. It often involves taking a small biopsy from the embryo, then analyzing the DNA in a lab to determine which embryos are healthy enough for transfer or carry a desired genetic profile. GIFT is a method where eggs and sperm are placed into the fallopian tube for natural fertilization, not a genetic test. Embryo biopsy is the sampling step used to obtain cells for testing, but the actual testing is the genetic analysis performed on those cells. Oocyte donation refers to providing eggs to another person, not testing embryos. Among these options, the one that directly involves testing embryos for genetic conditions before transfer is Preimplantation Genetic Testing.

Testing embryos for genetic conditions before transfer is done through Preimplantation Genetic Testing. This approach evaluates embryos at the cellular level to detect chromosomal abnormalities or specific gene disorders before deciding which embryo to transfer. It often involves taking a small biopsy from the embryo, then analyzing the DNA in a lab to determine which embryos are healthy enough for transfer or carry a desired genetic profile.

GIFT is a method where eggs and sperm are placed into the fallopian tube for natural fertilization, not a genetic test. Embryo biopsy is the sampling step used to obtain cells for testing, but the actual testing is the genetic analysis performed on those cells. Oocyte donation refers to providing eggs to another person, not testing embryos. Among these options, the one that directly involves testing embryos for genetic conditions before transfer is Preimplantation Genetic Testing.