Table 3.
The association between trigger type and IVF outcomes.
| Trigger Type | |||
|---|---|---|---|
| hCG trigger (ref) Mean (SD) |
Dual trigger Mean (SD) |
Adjusted RRa (95% CI) |
|
| Oocytes retrieved | 14.9 (7.2) | 18.1 (8.1) | 1.22 (1.15, 1.30) |
| Mature oocytes | 11.5 (6.1) | 13.5 (6.6) | |
| Mature oocytes rateb | 0.78 (0.18) | 0.75 (0.18) | 0.98 (0.94, 1.01) |
| Normally fertilized embryos (2PN) | 8.7 (5.2) | 11.0 (6.1) | |
| Fertilization ratec | 0.77 (0.23) | 0.80 (0.20) | 1.07 (1.03, 1.10) |
| Blastocystsd |
7.9 (4.0) n = 305 |
9.2 (4.7) n = 328 |
|
| Blastocyst conversion ratee | 0.72 (0.21) | 0.72 (0.20) | 0.99 (0.95, 1.04) |
| OHSS | 3 (0.6%) | 0 (0%) | |
| Number of embryos transferred | 1.5 (0.6) | 1.2 (0.5) | 0.85 (0.81, 0.89) |
aModel adjusted for maternal age at retrieval, ovarian diagnosis and AMH. Tested covariates that did not show a significant association between the exposure and the outcome and thus were not included in the final model were race, BMI, day 3 FSH, use of ICSI, day of embryo transfer, endometrial thickness and number of embryos transferred.
bMature oocyte rate defined as Mature oocytes/oocytes retrieved.
cFertilization rate defined as 2PNs/oocytes retrieved.
dOnly those with a day 5 transfer were included in the analysis.
eBlastocyst conversion rate defined as blastocysts/2PNs.