In vitro fertilization

Written by: Dr. Francisco Javier de Castro Pita
Edited by: Top Doctors®


In which cases can one resort to in vitro fertilization?

In principle, in vitro fertilization is a procedure that was described for patients who have a mechanical alteration of the reproductive function, that is, for patients who have an obstruction of the fallopian tubes.. Later, it was found that, provided they had oocytes, that is to say, ovules of adequate quality, any type of infertility could practically be subjected to an in vitro fertilization with their own oocytes.. It is currently used for alterations in semen values, for seminorams of not very good quality, for anovulatory cycles in patients over 35 years, for infertility of unknown cause with more than 35 years or in patients who do not have a own alteration of the tubes have not achieved a pregnancy with other types of treatments, for example with artificial insemination or with inductions of ovulation. In any case, if you can not resort to in vitro fertilization with your own oocytes, there is always the recourse to donate eggs, that is, to use donor eggs.


What stages does this process?

A cycle of in vitro fertilization can be carried out following different protocols, different treatment guidelines. As a general rule, the most common is that you have an ovarian braking phase, administer a treatment to leave the ovary at rest in a way that only responds to the hormones that we will then administer. A phase of induction of ovulation that usually lasts, depending on the type of patient and the response that that patient has, between ten and twelve days. Two or three more days to trigger ovulation, two or three days later the ovarian puncture is made and two or three days later, depending on the type of patient and the type of embryos that we have achieved, make the transfer of the embryos to the uterus of the patient. Once the transfer is made, it is necessary to wait between fourteen and sixteen days before being able to make the diagnosis of the existence or not of pregnancy. That is, the treatment would consist of a braking phase, a phase of induction of ovulation, triggering of ovulation, ovarian puncture and transfer of embryos.


What is your success rate?

The success rate in an assisted reproduction treatment is a totally relative term. In the human species the fecundability rate, the pregnancy rate per cycle under normal conditions, that is, in healthy couples of childbearing age, between 18 and 30 years, is approximately 25% and 30%. Under ideal conditions, the rate of pregnancies in this type of patient when there is any alteration should be close to that pregnancy rate, at 25 or 30%. Naturally, populations can be selected depending on age, depending on the pathology, depending on the time of infertility and statistically very different rates can be obtained from these. The rate of pregnancies that we get, globally with the whole group of patients that come to the consultation, comes to be about 27 or 28%, which is the fertility rate of the human species.

*Translated with Google translator. We apologize for any imperfection
Dr. Francisco Javier de Castro Pita

By Dr. Francisco Javier de Castro Pita
Fertility Specialty

Dr. Francisco Javier de Castro Pita specializes in Assisted Reproduction, with extensive experience in various assisted reproductive techniques such as artificial insemination or In Vitro Fertilization ( IVF). He is currently Head of the Unit of Reproduction, University Hospital Principe de Asturias.

*Translated with Google translator. We apologize for any imperfection