Table 1. Outcome measures.

Outcome	Definition	Calculation
Live birth rate	This metric gauges the number of successful deliveries with at least one live birth for every 100 cycles of embryo transfer.	Live birth rate = (number of live births/number of embryo transferred cycles) × 100
Clinical pregnancy rate	This rate signifies the detection of a fetal heartbeat using transvaginal ultrasound during the 6th week of gestation.	Clinical pregnancy rate = (number of diagnosed pregnancies with gestational sacs at 6th-week number of embryo transferred cycles) × 100.
Clinical miscarriage rate	This rate reflects the number of spontaneous pregnancy losses where a gestational sac or sacs were previously observed before the 20th week of gestation. Clinical miscarriage rate = (total number of miscarriage cases before 20th week/number of clinical pregnancy cases) × 100.	Clinical miscarriage rate = (total number of miscarriage cases before 20th week/number of clinical pregnancy cases) × 100.
Biochemical loss rate	This rate evaluates early pregnancy losses occurring within five weeks after implantation in relation to the number of confirmed biochemical pregnancies.	Biochemical loss rate = (number of early pregnancy losses/number of confirmed biochemical pregnancies) × 100.
Ongoing pregnancy rate	This rate is based on the presence of gestational sacs with a heartbeat at the 12th week of gestation.	Ongoing pregnancy rate = (number of gestational sacs with heartbeat at 12th week/number of embryo transferred cycles) × 100.
Implantation rate	This rate quantifies the number of gestational sacs observed through transvaginal ultrasound at the 6th week of gestation in relation to the number of embryos transferred.	Implantation rate = (number of gestational sacs observed at 6th week/total number of embryos transferred) × 100
MII rate	This rate represents the maturity of oocytes by comparing the number of matured oocytes to the number of retrieved oocytes.	MII rate = (number of matured oocytes/number of retrieved oocytes) × 100
Retrieval rate	This rate assesses the efficiency of oocyte retrieval by calculating the number of retrieved oocytes per 100 expected oocytes from follicles larger than 14 mm in diameter on the trigger day.	The formula for the retrieval rate is: retrieval rate = (number of retrieved oocytes/number of expected oocytes) × 100.
Blast rate	This rate indicates the proportion of successfully formed blastocysts in relation to the total number of matured oocytes injected.	Blast rate = (total number of blastocysts formed/total number of MII injected) × 100.
Good blast rate	This rate evaluates the quality of formed blastocysts (grade-1, indicated as AA, AB, BA) by comparing them to the total number of matured oocytes injected.	Good blast rate = (total number of grade-1 blastocysts/total number of MII injected) × 100.