Dr. Dori Rodríguez

What does an embryo biopsy entail?

Pre-implantation genetic diagnosis (PGD) is a technique that provides a ‘genetic understanding’ of the embryo before it is transferred to the uterus. Thanks to this technique, we are able to study the embryo’s chromosomal make-up and determine if it is a carrier of a hereditary condition of any kind. This information helps us to select the embryos that will lead to the birth of a healthy child. But how do we obtain this information?
Work is currently being carried out to discover non-invasive means of gathering genetic information from the embryo but, to date, the only means is an embryo biopsy. What is an embryo biopsy? […]

2018-01-31T10:04:31+02:002 de February de 2018|0 Comments

Can a patient know and choose their future child’s gender before embryo transfer?

It is possible to determine the gender of a future baby (embryo) before transfer takes place. In fact, this strategy has been used for many years in order to avoid the transmission of sex chromosome hereditary diseases (pre-implantation genetic diagnosis or PGD).
When the technique was in its early days, embryo analysis was carried out on day 3 of embryo development. Nowadays, it is carried out between days 5 and 7 of development (blastocyst stage). The analysis provides a simultaneous understanding of all the chromosomes in the embryo, meaning that transmission of chromosomal abnormalities can be completely eliminated. The technique has a 98% success rate. […]

2018-01-03T10:07:02+02:005 de January de 2018|0 Comments

When will my embryos be biopsied? Why?

During the performance of assisted reproduction procedures, the best embryo is selected for transfer into the mother’s uterus. The selection is based on the “look” of the embryo shortly before transfer. As a matter of fact, waiting time normally stretches until day 5 of embryo culture in order to enhance the potential of the selected embryo and its synchronisation with the endometrium.
Sometimes the selection is favoured by performing a Comprehensive Chromosome Screening (PGS/PGT-A/CCS) test. Thanks to this technique, we can find out if an embryo has all the chromosomes in their exact number, in other words, if it is chromosomally normal. In this way, the selection is both morphological (external look) and chromosomal (internal look).
To be able to analyse the embryo we must first biopsy it (take a cell sample) without affecting its development and subsequent implantation. Biopsy techniques have been evolving until the process has been optimised. […]

2018-03-26T18:06:15+02:0015 de January de 2016|0 Comments
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