Time-lapse evaluation of human embryo development in single versus sequential culture media--a sibling oocyte study.

Objective: To compare the dynamics of early development between embryos cultured in single and sequential media.

Design: Randomized, comparative study.

Setting: Private IVF centre.

Early cleavage morphology affects the quality and implantation potential of day 3 embryos.

Objective: To assess the development and implantation potential of early-cleaved embryos displaying various morphological patterns.

Design: Retrospective analysis.

Setting: Private IVF center.

Use of both early cleavage and day 2 mononucleation to predict embryos with high implantation potential in intracytoplasmic sperm injection cycles.

Objective: To evaluate the value of early cleavage and day 2 mononucleation as combined parameters in predicting the implantation potential of embryos.

Design: Prospectively designed retrospective cohort analysis.

Setting: Private IVF center.