Second cycle: to hatch or not to hatch?

@article{Dayal2007SecondCT,
  title={Second cycle: to hatch or not to hatch?},
  author={Molina B Dayal and Anil K. Dubey and David Frankfurter and Douglas Peak and Paul R. Gindoff},
  journal={Fertility and sterility},
  year={2007},
  volume={88 3},
  pages={718-20}
}
The objective of this study was to assess the impact of assisted hatching (AH) on pregnancy rate (PR), clinical pregnancy rate (CPR), and implantation rate (IR) after a single failed, fresh, nondonor IVF cycle. Accordingly, we report that patients with one prior implantation failure benefit from AH with improved PR, CPR, and IR in a subsequent cycle.