Table 1 Excluded studies.
Databases search exclusions: | |
|---|---|
Study ID | Reasons for exclusion |
Ashrafi et al.41 | Used two types of triggers in the GnRH antagonist group; hCG trigger in general and GnRH agonist trigger in cases at high risk of OHSS |
Chen et al.42 | A retrospective study |
Choi et al. 43 (one arm excluded) | A three-arm study included; an Early Flexible GnRH antagonist protocol, a Conventional Flexible GnRH antagonist protocol, and a Long GnRH agonist protocol. We only included the Conventional Flexible GnRH antagonist arm and the Long GnRH agonist arm |
Used a Per cycle analysis. Yet, we were not capable of reaching the study corresponding author due to an invalid e-mail | |
Lainas et al.25 | Used an Early GnRH antagonist protocol in the GnRH antagonist arm |
A three-arm study included; an Early Flexible GnRH antagonist protocol, a Conventional Flexible GnRH antagonist protocol, and a Long GnRH agonist protocol. We only included the Conventional Flexible GnRH antagonist arm and the Long GnRH agonist arm | |
Moshin et al.47 | A conference abstract. The per-cycle analysis was most likely used in this study. Yet, no response from the author was obtained to confirm its eligibility |
A three-arm study included; an Early Fixed GnRH antagonist protocol, a Conventional Fixed GnRH antagonist protocol and a Long GnRH agonist protocol. We only included the Conventional Fixed GnRH antagonist arm and the Long GnRH agonist arm | |
Vrtačnik-Bokal et al.49 | Not a randomized controlled trial |
A conference abstract with no numerical data, Yet, no response from the author was obtained to provide the study results | |
Hand search exclusions: | |
Study ID | Reasons for exclusion |
Orvieto et al.52 | A retrospective case series |
Orvieto et al.53 | A retrospective case series |
Kaur et al.54 | Not a randomized controlled trial |
Kdous et al.55 | A retrospective case–control study |
Kdous et al.56 | A retrospective case–control study |
Onofriescu et al.57 | Not a randomized controlled trial |
Segal et al.58 | A retrospective case series |
