[Prognostic factors of pregnancy in intrauterine insemination].

Background: The artificial insemination is the introduction of spermatozoa in the feminine genital tract without carrying out sexual contact and with the purpose of obtaining the pregnancy. The insemination intrauterine has improved its rate of success thanks to the technological advances and the best knowledge of human reproductive physiology.

Objectives: To evaluate the prognostic factors for the pregnancy success and calculate the cumulative rate per cycle in IUI (intrauterine insemination).

Comparison of the efficacy of the aromatase inhibitor letrozole and clomiphene citrate as adjuvants to recombinant follicle-stimulating hormone in controlled ovarian hyperstimulation: a prospective, randomized, blinded clinical trial.

Objective: To study the efficacy of the aromatase inhibitor letrozole as adjuvant to recombinant FSH (rFSH) in controlled ovarian hyperstimulation (COH).

Design: Prospective, randomized, and blinded clinical study.

Setting: Academic tertiary institute.

[Changes in a semen analysis related to spontaneous pregnancy in patients with infertility history].

Objective: To describe changes in a semen analysis before getting a spontaneous pregnancy.

Material And Methods: In an observational, descriptive, longitudinal and retrospective study a semen analysis of the first evaluation of 96 patients was compared with the exam accomplished before getting a spontaneous pregnancy. A descriptive analysis of the semen exam was performed and the results of both exams were compared by means of at Student test with statistical significance for p < 0.