Reproductive biology

Blastocyst embryo: What it is, advantages, types and classification according to its quality

What is a blastocyst

A blastocyst is a 5/6 day embryo with a complex cell structure
consisting of approximately 200 cells. The blastocyst stage is the stage of
development prior to the implantation of the embryo in the mother’s womb.

This cellular structure differs in two areas that will clearly determine
the quality of the embryo and its options […]

2020-07-01T13:08:06+02:003 de July de 2020|0 Comments

Embryo implantation bleeding

What is implantation bleeding?

Implantation is the process
through which an embryo starts its development in the maternal uterus and it
sometimes causes a bleeding. The implantation is caused by the growth of the
embryo -which is already in blastocyst stage
by the moment it arrives to the endometrium- enabling it to implant in the
walls of the uterus, and thus, […]

2020-06-15T14:38:47+02:0015 de June de 2020|0 Comments

What is Preimplantation Genetic Diagnosis (PGD)? Is PGD indicated in all patients?

Preimplantation genetic diagnosis (PGD) is a very useful tool in Assisted Reproduction for the genetic selection of embryos prior to their transfer to the maternal uterus. It allows the selection of healthy embryos for a large number of diseases and alterations, thus avoiding the transmission of hereditary diseases and the transfer of embryos that would […]

2020-06-11T11:37:26+02:0011 de June de 2020|0 Comments

What is the ‘implantation window’ in fertility treatment?

The ‘implantation window’ is the name we give to the period of time during which the endometrium in the mother’s uterus is in an appropriate state for embryo implantation to take place.

When does the implantation window occurs?

Implantation is a critical and very precise process during which the embryo makes contact with and penetrates the endometrial tissue in the […]

2020-07-03T15:13:38+02:006 de June de 2020|0 Comments

Why aren’t all embryos obtained from an IVF cycle suitable for freezing?

Why aren’t all embryos obtained from an IVF cycle suitable for freezing?

Today, in In Vitro Fertilization treatments, it is not extraordinary to find ourselves on the day of embryo transfer with a high number of good quality embryos. For a fresh transfer we shall be electing the embryo or embryos that morphologically and kinetically demonstrate greater development and ‘the other’ good quality ones can be cryopreserved.

[…]

2020-07-03T15:07:32+02:003 de June de 2020|1 Comment

Embryo fragmentation

Embryo fragmentation is a phenomenon that takes place in most embryos and its origin is not entirely clear. Some studies would seem to suggest that the fragments come from cell remains that have no nucleus or that they are the result of the decomposition of one or more cells from the embryo itself. The oocyte plays the most important role in fragmentation. Poor oocyte quality can lead to embryos that are highly fragmented. Embryo quality is determined by several characteristics such as the number of cells, their size or if the cell interior has an abnormality of any kind such as granularity or vacuolisation.

Types of embryo fragmentation

However, one of the factors that has most impact on embryo quality is the extent of fragmentation. Based on the amount, in percentage, of space that it occupies, fragmentation is categorised into 4 types or degrees.

[…]

2020-07-01T17:17:05+02:001 de June de 2020|0 Comments

Assisted Reproduction in Islam

Up until the past decade, assisted reproduction in the
Muslim world has been a taboo topic. Answers could not be found in the Quran,
and believers were unsure. 

Over the years, the great experts of Islam have been solving various doubts about assisted reproduction techniques. These precepts have been included in the set of laws of Islam […]

2020-06-01T12:54:47+02:001 de June de 2020|0 Comments

A negative beta hCG test. Now what?

What happens following the wait (‘the beta hCG wait’) which generates so much anxiety whilst, at the same time, creating the hope that our lives may be changed forever when, in the end, the result is negative?

Many patients say that the absence of symptoms meant that they knew what was coming; Others were also expecting the worst because they had begun to bleed prior to getting the result of the analysis.

Presence or absence of pregnancy symptoms

It’s important to point out that the presence, or absence of ‘symptoms’ which women associate with pregnancy, are not a means of diagnosis. It’s also important to clarify that vaginal bleeding of varying intensity is not infrequent prior to the programmed pregnancy test date and this does not necessarily mean that the result will be negative. Indeed, the results obtained from an analysis of the pregnancy hormone in blood, is the only reliable proof available. A urine analysis is also an option, but needs to be carried out a little later on and is not one hundred percent reliable.

[…]

2020-06-29T17:23:56+02:0017 de May de 2020|0 Comments

How many eggs on average are donated on an Egg Donation treatment at Instituto Bernabeu?

In Spain, we performed 40% of all egg donation cycles in Europe. The experience accumulated at Instituto Bernabeu in the last decades, allows us to offer to our patients a high quality and personalized treatment.

When a patient decides to go for an Egg Donation treatment, a chain work is set in the organization, in which we guarantee a commitment of trust, reliability and professional quality.  Matching the donor to each recipient patient allows a better quality and larger number of oocytes to be donated. We guarantee a minimum of 8 donated oocytes and a statistical average of 11.

Why an “x” number of eggs are donated? Why not only one?

[…]

2020-06-02T11:53:04+02:0010 de May de 2020|0 Comments

How long should I wait following unsuccessful assisted reproduction treatment?

We are often asked this question at our clinic because, following an unsuccessful attempt at in vitro fertilisation there is always the hope of another go. The recommendation has always traditionally been to leave a space of 3 months between each ovarian stimulation, which can be stressful for patients whose age is against them.

Research has been carried out with the aim of determining whether or not a wait is necessary. The studies compare a wait of one month with a wait of three months and the results obtained are the same.

It is for this reason that we do not recommend putting off a new attempt for more than one month in patients who need to carry out treatment as soon as possible.

[…]

2020-07-07T08:00:36+02:006 de May de 2020|0 Comments
Do you need help?