[From theory to clinical practice: recombinant FSH in daily practice]. / De la teoría a la clínica: la FSH recombinante en la práctica cotidiana.

The purpose of the present study is to determine the efficacy of induction ovulation with recombinant FSH in patients treated with in vitro fertilization and embryo transfer (IVF-ET) and basic assisted reproductive techniques (ART). One hundred seven cycles were analyzed. The patients were divided in two groups: Group 1, treated with IVF (n = 12) and group 2, treated with basic ART (n = 95). Only recombinant FSH was utilized for ovulation induction; human corionic gonadotropin (hCG), 10,000 IU, were administered when one or more dominant follicles with diameter > or = 18 mm were presents; oocyte retrieval was performed 34 hour, while intrauterine insemination was practiced at 36 hours after the hCG injection. The pregnancy rate per IVF cycle was 25.0%, and 16.4% for basic ART. It is concluded that ovulation induction with recombinant FSH is a good and efficient alternative for both variations of ART.

["Initial results of the first ambulatory program for in vitro fertilization in Mexico"]. / "Resultados iniciales del primer programa ambulatorio de fertilización in vitro en México".

Infertile couples treated with in vitro fertilization and embryo transfer (IVF-ET) seeking highest standards of case. The new programmes of IVF-ET are under pressure to generate as quickly as possible acceptable pregnancy rates. We report our experiences at a new IVF clinic, performing conventional IVF-ET and oocyte donation. Patients were treated in groups, their menstrual cycles were previously synchronized with luteal phase noretisterone. Both variants of IVF produced clinical pregnancies since the start of activity. In this paper the logistic and methodology are discussed. Today the aim of the programme is increasing the efficiency and efficacy of same.

[Methods of sex selection. A new method for preventing genetic diseases]. / Métodos de selección del sexo. Una nueva forma de prevención de enfermedades genéticas.

Determining sex of offspring has been a subject of intense interest for the public and professional community. Although methods of selecting sex before concepts are not entirely reliable, couples could satisfy their wishes for the size and composition of their family and the children might benefit by being wanted. On the other hand, the ability to selectively separate X from Y chromosome-bearing spermatozoa and use the X spermatozoa to preferentially produce female offspring; could be reduce, or may even eliminate, the probability of conceiving affected males of X-linked diseases.