Blastocyst development rate influences implantation and live birth rates of similarly graded euploid blastocysts.

Objective: To determine whether the blastocyst development rate, as assessed by the day of trophectoderm biopsy (day 5 vs. day 6), affects the live birth rate (LBR) of similarly graded euploid blastocysts.

Design: Retrospective cohort study.

High Q-factor microwave Fabry-Perot resonator with distributed Bragg reflectors.

A Fabry-Perot resonator operating at 39 GHz, with two pairs of quarter-wavelength single-crystal quartz Bragg reflectors has been realized. For the length of 98.26 mm, its Q-factor is about 560,000, which is 4.

High pregnancy rates can be achieved after freezing and thawing human blastocysts.

Objective: To examine the results of a 3-year trial using blastocyst cryopreservation to limit multiple pregnancy and optimize overall pregnancy per cycle.

Design: Retrospective clinical evaluation of pregnancy rates after freezing and thawing human blastocysts.

Setting: Tertiary-care academic center.