PGS/PGT-A/CCS

Why hasn’t my assisted reproduction treatment worked?

The miracle of conception involves an intimate union between the ova and spermatozoon, appropriate evolution of the fertilised embryo and, furthermore, an ideal environment inside the uterus so that implantation can take place. Whilst this process might seem simple, it is much more complex than we might think, particularly in human beings. Only 30% of our conceptions end in […]

2019-06-13T09:00:34+02:0014 de June de 2019|0 Comments

Can patients manage embryo and gamete transportation?

Whilst it is not part of the day-to-day routine at reproductive
medicine clinics, it is now increasingly common to have to transport biological
samples (oocytes, semen or embryos) from one clinic to another and even from
one country to another.

There can be several reasons for this such as the following:

– The
couple wishes to continue their treatment in a […]

2019-02-08T10:17:41+02:008 de February de 2019|0 Comments

The importance of embryo nutrition in achieving a successful cycle of in vitro fertilisation (IVF): metabolomics

One of the main limitations of assisted reproduction techniques are its embryo implantation failure rates. The implantation rate is the embryo’s ability to implant in the mother’s uterus. In other words, not all embryos are able to give rise to a pregnancy. Some have a greater chance of doing so than others. If it were possible to select embryos with the greatest ability to implant, it would be possible to improve assisted reproduction technique success rates. […]

2018-12-14T10:23:05+02:0014 de December de 2018|0 Comments

The advantages of comprehensive chromosome screening (PGS/PGT-A/CCS) in women of an advanced maternal age

Women currently seek guidance on reproduction at a much older age than they did some years ago. As a result, amongst the women who undergo fertility treatment, there is a significant group of women of an advanced age and their prognosis is poorer. This is a huge challenge for reproduction specialists. […]

2018-09-06T09:36:01+02:007 de September de 2018|0 Comments

Pre-implantation genetic diagnosis (PGD): comprehensive chromosome screening

Pre-implantacional genetic diagnosis (PGD) is a technique used to detect genetic or chromosomal abnormalities and it is performed on the embryo prior to transfer to the mother’s uterus.
Its use is recommended in couples where one of the partners is a carrier of a genetic or chromosomal abnormality that either means they are unable to get pregnant or increases the risk of pregnancy loss or abnormalities in their children. In some cases, it is the only means of having biologically healthy children and, in others, it is an alternative to prenatal diagnosis. […]

2018-03-26T19:03:51+02:0024 de November de 2017|0 Comments

CCS (Comprehensive Chromosome Screening) and unexplained sterility

Any couple that turns to a fertility clinic undergoes a number of tests in order to diagnose the fertility issue that is making natural conception impossible. It is estimated that, at the end of the process, 1 in 4 couples are provided with no apparent reason for the reproduction issue. In these couples, no significant findings came up in the diagnostic tests carried out both on the male and the female partner.
Circumstances such as these generate a great deal of uneasiness and doubts in couples because, with no known reason for their infertility, they feel as if they were in no man’s land. […]

2018-03-28T10:55:25+02:006 de October de 2017|0 Comments

Should embryos with chromosomal mosaicism be rejected?

When good quality embryos do not implant correctly or lead to pregnancy loss, in vitro fertilisation (IVF) does not provide us with the results we had hoped for. This is often because the embryo is a carrier of abnormal chromosomes. Fortunately, in our clinic, we have access to the very latest in embryo chromosome diagnosis techniques such as array CGH and next generation sequencing (NGS). We can use this technology to detect abnormalities in the embryo that will cause pregnancy loss or that will lead to the birth of a child with chromosomal abnormalities such as Down’s Syndrome, also known as trisomy 21. As such, we can use these techniques to select and transfer the embryos with the greatest chance of leading to the birth of healthy child. […]

2018-03-26T17:47:29+02:0025 de August de 2017|0 Comments

The advantages and disadvantages of pre-implantation genetic diagnosis (PGD)

Pre-implantation genetic diagnosis (PGD) consists of studying chromosomal abnormalities and genetic abnormalities in the embryo prior to transfer to the mother. Its purpose is to ensure that children are healthy and put an end to the transmission of a specific condition.
There are two types of PGD: the PGD aimed at selecting embryos that are free of a genetic disorder affecting a single gene (PGD) and the PGD that analyses genetic diseases affecting one or more chromosomes (PGS/PGT-A/CCS or PGS). Their names are sometimes a cause for confusion. The post entitled Are PGD, PGS and CCS all one and the same? clarifies the differences between them. […]

2018-03-28T10:52:16+02:0019 de May de 2017|0 Comments

Could it be implantation failure why I don’t get pregnant? Diagnosis in one day.

Achieving pregnancy when pregnancy does not come is one of the challenges the medical team at Instituto Bernabeu faces every day. One of the most important challenges of female infertility is implantation failure. The embryo does not get to nest in the maternal uterus or it does but the woman undergoes an early miscarriage, which produces a great frustration. The couple should put themselves as soon as possible in the hands of the specialist and not leave to chance or wait the passage of time to solve a situation that requires a personalized study.
Instituto Bernabeu Medical Director, Dr Rafael Bernabeu explains: “The causes of implantation failure are multiple, but contrary to the general opinion, patients believe they are causing the problem when, in fact, to a great extent the problem is embryonic”. Therefore, the medical centre global benchmark in reproductive medicine develops a study of the three patients: “The mother, the father and the embryo.” Twenty-five percent of embryo implantation failures cases, “do not have a clear cause” and in many cases, there is a combination of factors that can be combined, warns Dr Rafael Bernabeu. Not only are environmental and immunological factors, they are also due to the intake of certain foods and even to the cosmetics used. “We are exposed to tens of thousands of chemical substances and many generate disorders and among them may be the cause of repeated miscarriage and implantation failure,” says Dr Bernabeu. […]

2018-03-26T18:23:03+02:0027 de January de 2017|0 Comments

Implantation failure and repeated miscarriage. Treatment options

Successfully treating implantation failure and recurrent pregnancy loss is undoubtedly a challenge for doctors and for patients.

It is an area on which we continuously focus research at Instituto Bernabeu and, whilst we are far from finding a solution to all problems, the number of couples we are able to successfully treat is forever increasing.

An approach which does not take all 3 parties into account – the female, the male and the embryo – is incomplete. When evaluation only takes the couple into account, the reason behind the issue is only determined in under 20% of all cases. […]

2018-03-28T09:17:47+02:0015 de November de 2016|0 Comments
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