Skip to main content
. 2020 Jan 16;37(1):161–169. doi: 10.1007/s10815-019-01621-8

Table 2.

Fertilization rate and blastocyst formation rate in age-specific groups

Sequential medium Single-step medium Relative risk 95% confidence interval p value
Age < 38 (n) 183 249
Fertilization rate 69.8% 67.8% 0.9707 0.9181–1.0264 0.527
Blastocyst rate per 2PN 50.2% 52.2% 1.0402 0.9700–1.1155 0.484
High-grade blastocyst rate per 2PN 44.1% 40.2% 0.9130 0.8285–1.0061 0.166
No blastocyst formed cycle (n, %) 23 (12.6%) 34 (13.7%) 1.0864 0.6632–1.7797 0.775
Age ≥ 38 (n) 164 270
Fertilization rate 70.3% 65.1% 0.9272 0.8584–1.0014 0.310
Blastocyst rate per 2PN 33.6% 48.0% 1.4290 1.2844–1.5897 < 0.001
High grade blastocyst rate per 2PN 27.0% 31.6% 1.1677 0.9767–1.3961 0.134
No blastocyst formed cycle (n, %) 52 (31.7%) 81 (30.0%) 0.9462 0.7085–1.2635 0.748