Preimplantation Genetic Diagnosis/Screening
This treatment allows infertile couples who may have genetic diseases to conceive without passing the disease to the child.
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Preimplantation Genetic Diagnosis
This technique is used in our centre for couples who may have a genetic disease like thalassemia, cystic fibrosis, X linked disorders etc enabling them to ensure that the disease is not passed on to the child. Hence for these couples conception should be through IVF after PGD is done. The embryo biopsy is done by taking out one cell from the embryo and sending it for genetic analysis. PGD avoids pregnancy termination as it allows selection of an embryo free of the genetic disease before pregnancy is established. PGD is available for almost any inherited condition for which the exact mutation is known.
Preimplantation Genetic Screening:
If a woman is undergoing repeated early pregnancy loss ( abortions) it could be due to genetic problems in egg or sperm (aneuploidy) This does not manifest in parents but occur in the baby specially in elderly women. PGS testing screens your embryos for any chromosomal abnormalities before transferring the embryo into your uterus
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Frequently Asked Questions
An embryo biopsy is when one of our highly skilled embryologists removes a small number of cells from the outer layer of a five or six-day-old embryo. At this stage, the embryo is called a blastocyst, so you might have heard it referred to as a blastocyst biopsy instead.
The goal of both PGD and PGS is to increase the chance of selecting a healthy embryo that will develop into a healthy baby. These advances can make a real difference as birth defects occur in nearly one in 20 pregnancies, ranging in severity from minor anatomic abnormalities to extensive genetic disorders.
Older women are more likely to have eggs with the wrong number of chromosomes, so traditionally it’s been offered to women over 37. Abnormal chromosomes are thought to be the main reason why older women have difficulties conceiving and are more likely to have a miscarriage or a baby with Down’s Syndrome.
Preimplantation genetic diagnosis (PGD) is being used increasingly for infertility to dramatically improve the chance of a successful IVF pregnancy in couples where prior IVF failures have remained unexplained. It has been estimated that over half of all IVF failures are not able to be explained by an apparent problem with embryo “quality”. This discovery was brought about by the addition of preimplantation genetic diagnosis (PGD) to the tools available to scientists in the IVF laboratory. PGD has offered physicians and scientists, for the first time ever, the ability to examine far beyond the superficial appearance of an embryo.