Adding a small dose of the GnRH‑agonist triptorelin (0.2 mg) to the usual hCG trigger (250 µg) during IVF cycles for women who respond poorly to ovarian stimulation leads to more eggs, more mature eggs, and higher chances of fertilisation, pregnancy and live birth.

The study aimed to evaluate the impact of the dual trigger with the combination of GnRH agonist and standard dose of recombinant hCG on IVF outcomes in poor ovarian responders with GnRH antagonist protocol. 1283 cycles of 1010 poor responder patients according to Bologna criteria were retrospectively analysed in terms of final oocyte maturation: dual trigger group (250&#x2009;&#x3bc;g hCG + 0.2&#x2009;mg triptorelin) or standard group (250&#x2009;&#x3bc;g hCG). Primary outcome measures were the number of retrieved and mature oocytes. The secondary outcome measures were clinical pregnancy rates and live birth rates.The number of retrieved oocytes, mature oocytes, and the top-quality embryos transferred were significantly higher in the dual trigger group (<i>p</i>&#x2009;&lt;&#x2009;.001). Fertilisation rates (73.6% vs 69.6%, <i>p</i>&#x2009;=&#x2009;.009), implantation rates (18.7% vs 14.6, <i>p</i>&#x2009;=&#x2009;.039), clinical pregnancy rate per embryo transfer (27.5% vs. 19.9%, <i>p</i>&#x2009;=&#x2009;.010) and live birth rate per embryo transfer (21.6% vs. 14.9%, <i>p</i>&#x2009;=&#x2009;.011) were also significantly higher in the dual trigger group as compared to the hCG trigger group. The usage of dual trigger with a GnRH agonist and a standard dosage of hCG could improve clinical pregnancy rates and live birth rates in poor ovarian responders undergoing GnRH antagonist IVF/ICSI cycles.IMPACT STATEMENT<b>What is already known on this subject?</b> Dual trigger with standard dose of hCG has been the subject of trials in normal responders to optimise IVF outcomes. The results of these studies showed significant improvements in implantation and pregnancy rates with an increase in the number of mature oocytes retrieved. As a result, dual trigger has become a popular ovulation trigger option in GnRH antagonist cycles.<b>What do the results of this study add?</b> There is limited data about the use of dual trigger in poor ovarian responders (PORs). According to our study, increasing the number of retrieved oocytes, mature oocytes, the number of fertilised oocytes, the number of transferred embryos and top quality embryos transferred by using dual trigger in patients with PORs have a positive impact on pregnancy outcomes.<b>What are the implications of these findings for clinical practice and/or further research?</b> These findings implies potential advantages of dual trigger usage for improving IVF outcomes in PORs. With large sample sized prospective randomised trials, dual trigger with combination of GnRHa and a standard dose of hCG might replace the traditional ovulation trigger with hCG in PORs.