Assisted Reproductive Technologies

Why does Comprehensive Chromosome Screening (PGS/PGT-A/CCS) by array-CGH reduce miscarriage rates?

Miscarriage rates in the general population with no fertility problems range around 15-20%. In other words, one out of every five couples who achieve pregnancy suffers a spontaneous miscarriage, and 5% of these couples suffer it more than once. Even when pregnancy is achieved with the help of assisted reproduction techniques, miscarriage rates do not vary. For this reason, it is important when couples come to our clinic seeking reproductive counselling to perform comprehensive testing and design an adequate protocol for their case to secure the best result, which is a healthy baby at home, minimising the chances of miscarriage. In order to do that, one should know that miscarriages and pregnancy losses are caused by different reasons (uterine problems, immunological problems, and so on), and yet in half the cases there are chromosomal abnormalities in the embryo that prevent pregnancies to progress, hence causing miscarriages. Normal embryos have two copies of each chromosome, one inherited from the father and the other from the mother, and the chromosomal anomalies they may suffer involve a change in the number of copies, producing an imbalance in their genetic load which might block embryo development. […]

2018-05-14T08:49:14+02:0012 de February de 2016|0 Comments

Usefulness of Comprehensive Chromosomal Screening (PGS/PGT-A/CCS) in Recurrent Miscarriages

When couples make the decision to have a baby, either by natural means or by resorting to assisted reproduction techniques (ART), one of their main concerns is having a full-term pregnancy and a healthy baby. Miscarriage occurs in about 10-15% of pregnancies and is regarded as a “Recurrent miscarriage” when two or more pregnancies are lost spontaneously.
The cause of “Recurrent miscarriages” may be immunological, hormonal or uterine. Yet, the most common cause is no doubt chromosomal, since it is present in more than 50% of cases. […]

2018-05-09T12:19:54+02:0011 de December de 2015|0 Comments
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