Embryo transfer practices in the United States: a survey of clinics registered with the Society for Assisted Reproductive Technology

Five-years of a mandatory single-embryo transfer (mSET) policy dramatically reduces twinning rate without lowering pregnancy rates

“…Of the nearly 70,000 cycles reported to SART in 2004-2006, SET was performed in only 4.4% (7). A survey of embryo transfer practices in the US in 2008 revealed that only 5% of clinics surveyed had SET criteria and 55% would transfer two embryos for patient request (8). Previous research at our center showed that patients are more likely to entertain SET if educated about risks, but they still desperately seek the highest possible pregnancy rates (9).…”

Predicting personalized multiple birth risks after in vitro fertilization–double embryo transfer

“…Although a laudable effort, its bar is set so high as to address only a fraction of all patients being treated. Deviations from guidelines are inevitable as healthcare providers consider an individual patient's reproductive history and perception of the risks of multiple birth (7,(12)(13)(14)(15). Finally, despite reports advocating eSET, especially by European groups, large-scale standardization of criteria and implementation have been difficult to achieve (16).…”

La criopreservación embrionaria en estadios más avanzados de desarrollo disminuye la frecuencia de pacientes con embriones criopreservados y el número de embriones criopreservados

“…Por lo tanto, uno de los grandes desafíos es reducir la frecuencia de multigestación 10 . Es por eso que las sociedades médicas de países desarrollados abogan por la transferencia de uno o dos embriones, de acuerdo a la edad de la paciente y los resultados anteriores [11][12][13][14][15][16] .…”