Does the “freeze-all” policy allow for a better outcome in assisted reproductive techniques than the use of fresh embryo transfers? – A retrospective study on cumulative live birth rates

The CLBRs in the study group were significantly higher than those in the control group (64.3% vs. 45.8%, p = 0.001). Subgroup analysis revealed that when the number of oocyte pick up (OPU) is between 4 and 15, the CLBRs in the study group were significantly better (58.3% vs. 40.9%, p = 0.042). For those with OPU <4 or OPU >15 the CLBRs were similar in these two groups (OPU < 4: study vs. control 23.1% vs. 18.8% respectively, p = 0.713; OPU>15: study vs. control 85.7% vs. 80.8% respectively, p = 0.625) CONCLUSION: The Freeze-all policy improved the ART outcome for normal responders.