John Z Zorzovilis

Flexible GnRH antagonist versus flare-up GnRH agonist protocol in poor responders treated by IVF: a randomized controlled trial.

E. Kolibianakis, E. Papanikolaou, T. Lainas, 2008, Human reproduction.

In a flexible antagonist protocol, earlier, criteria-based initiation of GnRH antagonist is associated with increased pregnancy rates in IVF.

E. Alexopoulou, G. Stavropoulou, T. Lainas, 2005, Human reproduction.