in vitro fertilisation

AIDS. Assisted reproduction is the best option

The risk of contracting HIV during unprotected sexual intercourse is estimated to be between 0.5 and 1%. For serodiscordant couples (one partner is a carrier), trying for a child naturally can entail an elevated risk of transmission. In cases such as these, assisted reproduction techniques are an excellent choice for getting pregnant without the risk […]

2019-01-11T10:57:28+02:0011 de January de 2019|0 Comments

Embryonic development: the embryo on day 1 (D1)

When an oocyte is in an optimum state of maturation, ovulation takes place. This is known as day 0 of development (D0) and fertilisation by a competent spermatozoon must take place during this period.

When the oocyte is fertilised, it is then known as a zygote and
we are now on D1 of development. Certain characteristics and essential
structures need […]

2019-01-04T09:51:56+02:004 de January 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

Obesity and fertility

The extent of the issue
Obesity is a public health issue both in the general population and in women of childbearing age. The figures are a proof of this and, far from improving, the problem has been getting progressively worse over the last few years.
Maternal obesity in the United States of America was calculated to be 7% in 1980 and had risen up to 24% by 1999. If we take into account both obesity and excess weight, the available data indicates that the figures were 37.1% in 1999 and 40.5% in 2003.
The NHANES (National Health and Nutrition Examination Survey) reveals obesity figures (BMI or body mass index ≥ 30 kg/m2) in women of reproductive age (20 to 39 years of age) of 31.9%.
In other words, one in every three women of a fertile age is obese. […]

2018-12-07T10:06:37+02:007 de December de 2018|0 Comments

Infertility in men and cryptorchidism

Cryptorchidism, from the Greek words kriptos (hidden) and orquis (testicle), is the failure of one or both testes to descend to the scrotum. It is estimated that between 2 and 5% of newborn boys have this abnormality although the figure rises to 30% when premature boys are taken into account. In many cases, the issue resolves itself naturally and, as a result, at one year of age, only 1% of boys have the condition. […]

2018-11-21T10:23:53+02:0023 de November de 2018|0 Comments

What is the impact of obesity on male fertility?

Obesity, when understood as a body mass index (BMI) in excess of 30kg/m2, is associated with numerous health issues including hypertension, diabetes, hypercholesterolemia and so on. It also affects fertility. In women, the impact of obesity is very clear. It generates hormonal abnormalities that have a direct impact on a woman’s ability to reproduce. As a result, obesity in women has been the subject of numerous studies and there are a large number of publications on the matter. […]

2018-11-09T13:11:18+02:009 de November de 2018|0 Comments

Is there hope for me following fertilisation failure after ICSI?

In vitro fertilisation treatment (IVF) techniques consist of fertilising oocytes with spermatozoa in a laboratory. They are held under conditions that are similar to their natural environment and, a few days later, the best embryo is selected and placed in the woman’s uterus where it remains until it implants. From this point on, monitoring procedures are the same as in any other spontaneous or natural pregnancy. […]

2018-11-02T14:19:35+02:002 de November de 2018|0 Comments

Breast cancer and fertility

Breast cancer is the most common malignant tumour found in women and it is the main cause of death in women due to cancer in the world.
Over the last few years, there has been an increase in this pathology in younger women and, at the same time, treatment has taken breast cancer survival rates to almost 85%. These facts and a pronounced trend towards delaying motherhood has generated a group of women whose ability to reproduce has been negatively affected before they have had the chance to turn their dream of becoming a mother into a reality. […]

2018-10-17T09:07:54+02:0019 de October de 2018|0 Comments

Seminal lavage: what is it and what is it used for?

Human immunodeficiency virus (HIV), hepatitis C (HCV) and hepatitis B (HBV) are viruses that are transmitted through blood and body fluids as well as through vertical transmission (from the mother to the foetus).  As a result, couples wishing to get pregnant in which one partner is a carrier of a virus are faced with the question of whether or not it is possible to do so without the other partner getting infected. If the male partner has one of these viruses and his female partner does not (serodiscordant couples), assisted reproduction technology (ART) can be used in order to avoid transmission. […]

2018-10-03T09:50:57+02:005 de October de 2018|0 Comments

Polycystic Ovary Syndrome

The term polycystic ovary syndrome is used to define an ultrasound diagnosis characterised by the presence of 12 or more follicles in each ovary (between 2 and 9 mm in diameter) and/or an incremented ovary volume (>10 ml). Findings such as these in ultrasounds in a single ovary are sufficient in order to be able to give a diagnosis. However, since taking oral contraceptives can change ovary morphology, this diagnostic criteria does not apply to women who take oral contraceptives.
From a practical point of view, when assisted reproduction technology (ART) is being used, detection of polycystic ovaries in isolation is useful for predicting the ovary’s response to stimulation using drugs and the risk of ovarian hyperstimulation syndrome. […]

2018-08-29T13:55:38+02:0031 de August de 2018|0 Comments
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