RESUMEN
Culture media supplemented with reproductive fluids (RF) have been used in livestock species, improving the efficiency and quality of in vitro produced embryos. However, usefulness in humans is still unknown. In this study, we collected human reproductive fluids (HRFs) ex vivo (from 25 patients undergoing abdominal hysterectomy plus bilateral salpingectomy) and in vivo (from 31 oocyte donors). Afterward, protocols to evaluate their osmolality, pH, total protein concentration, endotoxin level, and sterility were optimized, establishing security ranges for their use as natural additives. In addition, a functional assay was developed with bovine embryos grown in vitro in a medium supplemented with 1% of collected HRFs. Finally, a proof of concept was performed with six patients on post ovulation day 2 to evaluate the full-term viability of embryos grown in media supplemented with autologous uterine fluid, collected under in vivo conditions. Two of the embryos resulted in successful pregnancy and delivery of healthy babies. In conclusion, this study establishes a complete quality control sheet of HRFs as additives for embryo culture media and shows first preliminary data on obtaining healthy offspring derived from embryos grown in media supplemented with HRFs.
RESUMEN
PURPOSE: The plasminogen/plasmin system is an important extracellular protease system whose function has been implicated in male reproductive function. However, its clinical relevance to fertility in human assisted reproduction technologies has not been systematically investigated. Here, we examined whether total and active populations of urokinase-type plasminogen activator (uPA) in human seminal plasma and spermatozoa are predictive of pregnancy outcome in couples undergoing insemination or intracytoplasmic sperm injection (ICSI). METHODS: Seminal samples from 182 men, 5 donors, 21 patients attending the clinic for infertility screening, and 156 for assisted reproduction technology (ART) treatment (insemination and ICSI), were evaluated. Total uPA in seminal plasma and spermatozoa as well as active uPA in seminal plasma were measured by ELISA. Sperm quality parameters and fertility outcomes following insemination or ICSI were correlated with the uPA values. RESULTS: Active uPA in seminal plasma was positively correlated to the volume of the ejaculate, total number of spermatozoa in the ejaculate, and total motility. However, these values were not prognostic of fertility outcomes. Total uPA in spermatozoa was inversely related to sperm concentration, total sperm in ejaculate, morphology, and total and progressive motility, and this measure was not related to fertility. Importantly, however, higher values of total uPA in seminal plasma were detected in cases that resulted in pregnancy compared to those that did not follow insemination and ICSI treatment. CONCLUSIONS: Taken together, these findings lay the foundation for further understanding the mechanism by which total uPA in seminal plasma affects fertility and how this marker can be used as a predictor of ART outcomes.
Asunto(s)
Infertilidad Masculina/terapia , Resultado del Embarazo , Técnicas Reproductivas Asistidas , Semen/metabolismo , Espermatozoides/fisiología , Activador de Plasminógeno de Tipo Uroquinasa/metabolismo , Adolescente , Adulto , Estudios de Casos y Controles , Femenino , Humanos , Masculino , Persona de Mediana Edad , Embarazo , Inyecciones de Esperma Intracitoplasmáticas , Motilidad Espermática , Espermatozoides/citología , Adulto JovenRESUMEN
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder among reproductive-aged women and the main cause of infertility due to anovulation. However, this syndrome spans the lives of women affecting them from in-utero life until death, leading to several health risks that can impair quality of life and increase morbidity and mortality rates. Fetal programming may represent the beginning of the condition characterized by hyperandrogenism and insulin resistance which leads to a series of medical consequences in adolescence, adulthood, and old age. Menstrual and fertility problems evolve into metabolic complications as age advances. An early and precise diagnosis is important for an adequate management of PCOS, especially at the extreme ends of the reproductive lifespan. However, many different phenotypes are included under the same condition, being important to look at these different phenotypes separately, as they may require different treatments and have different consequences. In this way, PCOS exhibits a great metabolic complexity and its diagnosis needs to be revised once again and adapted to recent data obtained by new technologies. According to the current medical literature, lifestyle therapy constitutes the first step in the management, especially when excess body weight is associated. Pharmacotherapy is frequently used to treat the most predominant manifestations in each age group, such as irregular menses and hirsutism in adolescence, fertility problems in adulthood, and metabolic problems and risk of cancer in old age. Close surveillance is mandatory in each stage of life to avoid health risks which may also affect the offspring, since fetal and post-natal complications seem to be increased in PCOS women.
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Crecimiento y Desarrollo/fisiología , Síndrome del Ovario Poliquístico/fisiopatología , Adolescente , Adulto , Femenino , Humanos , Persona de Mediana Edad , Reproducción/fisiología , Maduración Sexual/fisiología , Adulto JovenRESUMEN
The purpose of this study was to evaluate the effect of docosahexaenoic acid (DHA) dietary supplementation on semen quality, fatty acid composition, antioxidant capacity, and DNA fragmentation. In this randomized, double blind, placebo-controlled, parallel-group study, 74 subjects were recruited and randomly assigned to either the placebo group (n=32) or to the DHA group (n=42) to consume three 500-mg capsules of oil per day over 10 weeks. The placebo group received 1,500 mg/day of sunflower oil and the DHA group 1,500 mg/day of DHA-enriched oil. Seminal parameters (semen volume, sperm concentration, motility, morphology, and vitality), total antioxidant capacity, deoxyribonucleic acid fragmentation, and lipid composition were evaluated prior to the treatment and after 10 weeks. Finally, 57 subjects were included in the study with 25 in the placebo group and 32 in the DHA group. No differences were found in traditional sperm parameters or lipid composition of the sperm membrane after treatment. However, an increase in DHA and Omega-3 fatty acid content in seminal plasma, an improvement in antioxidant status, and a reduction in the percentage of spermatozoa with deoxyribonucleic acid damage were observed in the DHA group after 10 weeks of treatment.
Asunto(s)
Antioxidantes/metabolismo , Fragmentación del ADN , Suplementos Dietéticos , Ácidos Docosahexaenoicos/administración & dosificación , Semen/metabolismo , Espermatozoides/metabolismo , Método Doble Ciego , Humanos , Metabolismo de los Lípidos , Masculino , PlacebosRESUMEN
The endometrium is one of a number of factors involved in achieving optimal outcomes after assisted reproductive treatment. Owing to its "passive" growth following adequate ovarian stimulation, it has received virtually no attention. Only when either endometrial thickness or ultrasonographic pattern seem inadequate have different strategies been assessed to try to improve it, especially in those cases where it seems difficult or impossible to make it grow. The objective of this review is to summarize the different strategies that have been investigated in patients with inadequate endometrium, to attempt to provide solid evidence of therapies that may be beneficial and to move away from empirism. A review of the existing literature was performed by searching MEDLINE, EMBASE, Cochrane library and Web of Science for publications in English related to refractory endometrium. Most current treatments are based on anecdotal cases and not on solid data, although worldwide many doctors and patients use them. In conclusion, this review found that it is not easy to provide a pragmatic, evidence-based approach to help physicians and patients confused by the available data on how to improve a poor endometrium. Honest balanced information provided to our patients is the best that we can do.
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Endometrio/patología , Enfermedades Uterinas/terapia , Endometrio/fisiopatología , Femenino , Humanos , Técnicas Reproductivas Asistidas , Enfermedades Uterinas/fisiopatologíaRESUMEN
STUDY QUESTION: Is there an association between blastocyst collapse patterns and implantation potential? SUMMARY ANSWER: Embryos that exhibit collapse are as likely to hatch as those that do not, but are less likely to implant and should not be replaced if alternatives are available. WHAT IS KNOWN ALREADY: Studies of blastocyst collapse in different species of mammals have found that most blastocysts, that experience consecutive weak contractions, hatch successfully whereas those that exhibit strong contractions or collapse, fail to hatch. STUDY DESIGN, SIZE, DURATION: Retrospective cohort study. Seven hundred and fifteen transferred blastocysts were analyzed from July 2012 to May 2013. PARTICIPANTS/MATERIALS, SETTING, METHODS: University-affiliated infertility center. Participant patients were recipients of oocyte donation and autologous IVF cycles (n = 460). Embryo development was analyzed with a time-lapse imaging system. Variables studied included blastocyst collapse (defined as the separation of ≥50% of the surface of the trophectoderm of the blastocyst from the zona pellucida), kinetic variables, embryo morphology, implantation and clinical pregnancy rates. MAIN RESULTS AND THE ROLE OF CHANCE: A total of 139 blastocysts presented collapse (19.4%), of these 8 presented 2 collapses and 2 presented 3 collapses. The timings of embryo cleavages and the time taken to reach the morula stage and blastulation were significantly shorter in embryos with collapse than in those without. Implantation rates were compared in cycles where either all or none of the embryos replaced, implanted so that implantation data were known for every embryo. Among 408 embryos without collapse and 94 embryos with at least one collapse (94) the implantation rates were 48.5% (95% confidence intervals (CI) 46.7-53.4%) and 35% (95% CI 25.3-44.9%), respectively. The percentage of embryos that hatched was similar in both groups 28.7 and 31%, respectively. LIMITATIONS, REASONS FOR CAUTION: The retrospective nature of the study limits its potential value. WIDER IMPLICATIONS OF THE FINDINGS: Study the collapse pattern of the blastocyst, may assist selection of the blastocysts most likely to implant and increase IVF/ICSI success rates.
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Blastocisto , Implantación del Embrión/fisiología , Técnicas Reproductivas Asistidas , Adulto , Femenino , Humanos , Embarazo , Estudios Retrospectivos , Imagen de Lapso de TiempoRESUMEN
In this study, we evaluated the effects of the thawing methodology on sperm function after cryopreservation in pellets. We compared the use of two thawing procedures: method (1) maintaining pellet for 10 min in air at room temperature, then another 10-min period in air at 37°C followed by dilution in a thawing medium; and method (2) immersing the pellets directly in thawing medium at 37°C for 20 min. This procedure leads to a higher rate of temperature increase and a dilution of the glycerol present in the freezing medium. We analyzed the effect of the thawing procedure on sperm motility, viability, membrane lipid packing disorder, acrosome status, reactive oxygen species (ROS) level and sperm chromatin condensation. This study revealed a positive effect of the M2 thawing methodology on sperm parameters. The percentage of spermatozoa with fast-linear movement is increased (M1: 17.26% vs. M2: 28.05%, p<0.01), with higher viability (M1: 37.81% vs. M2: 40.15%, p<0.01) and less acrosome damage (M1: 40.44% vs. M2: 35.45%, p=0.02). We also detected an increase in the percentage of viable spermatozoa with low membrane lipid disorder (M1: 31.36% vs. M2: 33.17%, p=0.03) and a reduction in chromatin condensation (44.62 vs. 46.62 arbitrary units, p=0.02). Further studies will be necessary to evaluate the possible clinical applications.
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Criopreservación/métodos , Crioprotectores/farmacología , Glicerol/farmacología , Preservación de Semen/métodos , Semen/efectos de los fármacos , Motilidad Espermática/efectos de los fármacos , Acrosoma/efectos de los fármacos , Acrosoma/metabolismo , Membrana Celular/metabolismo , Membrana Celular/ultraestructura , Supervivencia Celular/efectos de los fármacos , Cromatina/química , Cromatina/ultraestructura , Ensamble y Desensamble de Cromatina , Congelación , Humanos , Masculino , Lípidos de la Membrana/análisis , Lípidos de la Membrana/metabolismo , Microscopía , Especies Reactivas de Oxígeno/metabolismo , Semen/fisiología , Análisis de SemenRESUMEN
OBJECTIVE: To assess if the luteinizing hormone/human chorionic gonadotropin present in some gonadotropin formulations may be of benefit in protocols with GnRH antagonists. METHODS: Open, quasi-experimental, multicenter, prospective, parallel-controlled study compared 136 women undergoing in vitro fertilization--intracytoplasmic sperm injection after stimulation with highly purified human menopausal gonadotropin (hp-hMG) (n = 44), recombinant-follicle stimulating hormone (r-FSH) (n = 46), or a combination of both (r FSH + hp-hMG) (n = 46) following an antagonist protocol. Blood determinations were made on day 6 of stimulation and on the day of ovulation induction, with centralized analysis. RESULTS: No differences were found in the ongoing pregnancy rates between groups [37.0% versus 29.5% (hp-hMG) and 23.9% (r-FSH); p = 0.688]. However, the ratio top-quality embryos/retrieved oocytes (TQE/RO) was higher in the combined therapy group (19.6%)--reaching significance versus the r-FSH group (6.5%) (p = 0.008), but not versus hp-hMG (12.3%) (p = 0.137). CONCLUSIONS: An improved TQE/RO ratio was obtained together with a greater percentage of frozen embryos in the patients that incorporated hp-hMG to their stimulation protocol. Despite good results of adding hp-hMG, non statistical differences were found in terms of ongoing pregnancy rate.
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Hormona Folículo Estimulante Humana/administración & dosificación , Hormona Liberadora de Gonadotropina/análogos & derivados , Infertilidad Femenina/tratamiento farmacológico , Menotropinas/administración & dosificación , Inducción de la Ovulación/métodos , Inyecciones de Esperma Intracitoplasmáticas/métodos , Adulto , Análisis de Varianza , Distribución de Chi-Cuadrado , Esquema de Medicación , Quimioterapia Combinada , Femenino , Fármacos para la Fertilidad Femenina/administración & dosificación , Hormona Liberadora de Gonadotropina/administración & dosificación , Humanos , Recuperación del Oocito , Selección de Paciente , Embarazo , Índice de Embarazo , Estudios Prospectivos , Análisis de Regresión , Resultado del TratamientoRESUMEN
BACKGROUND: Ovarian hyperstimulation syndrome (OHSS) seems to be induced by the ovarian release of vascular endothelial growth factor (VEGF), which increases vascular permeability. Dopamine agonists inhibit VEGF receptor phosphorylation and thereby decrease vascular permeability. METHODS: A randomized, double-blind, placebo-controlled, multicentre study assessing three oral doses (50, 100, 200 microg/day) of the non-ergot derived dopamine agonist quinagolide started on the day of human chorionic gonadotrophin (hCG) and continued for 17-21 days without dose-titration in comparison to placebo in preventing moderate/severe early OHSS (onset < or =9 days after hCG administration) in 182 IVF patients with > or =20 but less than 30 follicles > or =10 mm. RESULTS: The incidence of moderate/severe early OHSS was 23% (12/53) in the placebo group and 12% (6/51), 13% (7/52) and 4% (1/26) in the quinagolide 50, 100 and 200 microg/day groups, respectively. The moderate/severe early OHSS rate was significantly lower with all quinagolide groups combined compared with placebo [P = 0.019; OR = 0.28 (0.09-0.81)]. The incidence of ultrasound evidence of ascites among patients with no clinical pregnancy was significantly reduced from 31% (8/26) with placebo to 11% (8/70) with all quinagolide groups combined [P = 0.033; OR = 0.29 (0.10-0.88)], although there was no difference for those with clinical pregnancy. Quinagolide did not have a detrimental effect on pregnancy or live birth rates. The incidence of gastrointestinal and central nervous system adverse events increased with increasing doses of quinagolide. CONCLUSIONS: Quinagolide appears to prevent moderate/severe early OHSS while not affecting treatment outcome. The effect is more marked in patients who did not achieve a clinical pregnancy. Quinagolide administered in high doses without dose-titration is associated with poor tolerability. ClinicalTrials.gov Identifier: NCT00329693.
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Aminoquinolinas/farmacología , Agonistas de Dopamina/farmacología , Fertilización In Vitro , Síndrome de Hiperestimulación Ovárica/prevención & control , Adulto , Aminoquinolinas/administración & dosificación , Aminoquinolinas/efectos adversos , Ascitis/prevención & control , Agonistas de Dopamina/administración & dosificación , Agonistas de Dopamina/efectos adversos , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Fertilización In Vitro/efectos adversos , Humanos , Recién Nacido , Síndrome de Hiperestimulación Ovárica/sangre , Embarazo , Resultado del Embarazo , Prolactina/sangre , Inyecciones de Esperma Intracitoplasmáticas , Resultado del Tratamiento , Adulto JovenRESUMEN
In this study, we evaluated the effects of genistein supplementation of the thawing extender on frozen-thawed human semen parameters. We analyzed the effect of supplementation on sperm motility, capacitation (membrane lipid disorder), reactive oxygen species (ROS) generation, chromatin condensation and DNA damage. Using this preliminary information, it maybe possible to improve the cryopreservation process and reduce the cellular damage. We have confirmed that the isoflavone genistein (10 micromol L(-1)) has antioxidant properties on the frozen-thawed spermatozoa. This results in a decreased ROS production that shows a slight improvement in the sperm motility, and decreases the membrane lipid disorder and DNA damage caused by cryopreservation. These results suggest an effect of genistein on sperm functionality that could be of interest for assisted reproduction treatments using frozen-thawed human spermatozoa, but further studies will be necessary to confirm our findings and to evaluate the possible clinical applications.
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Antioxidantes/farmacología , Criopreservación , Crioprotectores/farmacología , Genisteína/farmacología , Supervivencia Celular/efectos de los fármacos , Ensayo Cometa , Fragmentación del ADN , Citometría de Flujo , Congelación , Humanos , Masculino , Especies Reactivas de Oxígeno/metabolismo , Motilidad Espermática/efectos de los fármacos , Espermatozoides/efectos de los fármacos , Espermatozoides/fisiologíaRESUMEN
In our series, a very high prevalence of chromosomal abnormalities was observed in spontaneous miscarriages, irrespective of how pregnancy was achieved, by assisted reproductive technology (ART) or natural conception. This high prevalence was equally represented in both groups, with no statistical difference in type of chromosomal abnormalities or in total frequency; however, the incidence of monosomy X is increased and the polyploidies are decreased in abortus after intracytoplasmic sperm injection (ICSI) when it is compared with miscarriages after spontaneous gestations.
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Aborto Espontáneo/genética , Aberraciones Cromosómicas , Análisis Citogenético , Técnicas Reproductivas Asistidas/efectos adversos , Aborto Espontáneo/epidemiología , Adulto , Estudios de Casos y Controles , Cromosomas Humanos X , Cromosomas Humanos Y , Femenino , Fertilización In Vitro/efectos adversos , Edad Gestacional , Humanos , Incidencia , Inseminación Artificial/efectos adversos , Monosomía , Mosaicismo , Poliploidía , Embarazo , Prevalencia , Inyecciones de Esperma Intracitoplasmáticas/efectos adversos , Insuficiencia del Tratamiento , TrisomíaRESUMEN
PURPOSE: The objective of this study was to evaluate the effect of men and recipient age on the reproductive outcome of our oocyte donation program. METHODS: We retrospectively analyzed 915 cycles, taking into account men and recipient age, separately and together. RESULTS: The significant cut off value for men and recipients age with incidence in the reproductive outcome was 39 years. Recipient older than 38 years presented a significantly lower pregnancy and implantation rates than others (44.92 vs. 55.75 +/- 1.53%, 25.66 vs. 32.79 +/- 1.64%). If men age was older than 38, a significant reduction in pregnancy and implantation rates was observed, too (46.0 vs. 54.65%, 26.00 +/- 1.52 vs. 32.43 +/- 1.65%). When men and recipient age was analyzed together, a reduction in pregnancy and implantation was detected only if both were older than 38. CONCLUSIONS: Present study suggests that age has a detrimental effect on the reproductive outcome of oocyte donation cycles when both men and recipient are > or = 39 years old.
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Envejecimiento , Donación de Oocito , Resultado del Embarazo , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Embarazo , Índice de Embarazo , Estudios Retrospectivos , Adulto JovenRESUMEN
BACKGROUND: Letrozole is the third-generation aromatase inhibitor (AI) most widely used in assisted reproduction. AIs induce ovulation by inhibiting estrogen production; the consequent hypoestrogenic state increases GnRH release and pituitary follicle-stimulating hormone (FSH) synthesis. METHODS: A systematic search of the literature was performed for both prospective and retrospective studies. Meta-analyses of randomized clinical trials (RCTs) were performed for three comparisons: letrozole versus clomiphene citrate (CC), letrozole + FSH versus FSH in intrauterine insemination (IUI) and letrozole + FSH versus FSH in IVF. In the absence of RCTs, non-randomized studies were pooled. RESULTS: Nine studies were included in the meta-analysis. Four RCTs compared the overall effect of letrozole with CC in patients with polycystic ovary syndrome. The pooled result was not significant for ovulatory cycles (OR = 1.17; 95% CI 0.66-2.09), or for pregnancy rate per cycle (OR = 1.47; 95% CI 0.73-2.96) or for pregnancy rate per patient (OR = 1.37; 95% CI 0.70-2.71). In three retrospective studies which compared L + FSH with FSH in ovarian stimulation for IUI, the pooled OR was 1.15 (95% CI 0.78-1.71). A final meta-analysis included one RCT and one cohort study that compared letrozole + gonadotrophin versus gonadotrophin alone: the pooled pregnancy rate per patient was not significantly different (OR = 1.40; 95% CI 0.67-2.91). CONCLUSIONS: Letrozole is as effective as other methods of ovulation induction. Further randomized-controlled studies are warranted to define more clearly the efficacy and safety of letrozole in human reproduction.