Early pronuclear breakdown is a good indicator of embryo quality and viability.

Objective: To examine whether the timing of pronuclear breakdown can be a predictor of embryo quality and viability.

Design: Retrospective comparison of the development and quality of early and late developing zygotes.

Setting: Infertility and endocrinology unit in a university hospital.

Catheter type does not affect the outcome of intrauterine insemination treatment: a prospective randomized study.

Objective: To compare the main outcome of IUI with the Gynetics catheter (Gynetics Medical Products, Hamont-Achel, Belgium) or the Makler cannula (Sefi-Medical Instruments, Haifa, Israel).

Design: Prospective, randomized study.

Setting: Infertility and endocrinology unit in a university hospital.