If we compare day 6 in group A (mean age of 36.1 Æ 4.9) with
day 6 outcome in group B (mean age of 36.4 Æ 4.4), the following
data in terms of implantation, cPR, and oPR was observed: 28.0%,
37.8%, and 28.6% vs. 41.4%, 50.0%, and 41.5%, respectively (see
Table 7). As shown in Table 7, implantation, cPR, and oPR
Table 4
Retrospective outcome data (2004–June 2019) at the Fertility Centers of Illinois, Chicago, from
vitrified day 5 blastocysts in regard to the patients’ age
Patient’s age (y)
Donor
<35
35–37
38–40
>40
Cycles
2940
1479
948
474
471
Transfers
2938
1478
946
472
470
Blastocysts survived
99.0
99.0
99.6
98.7
98.4
Blastocysts transferred (mean)
1.5
1.4
1.5
1.6
1.6
Positive pregnancy/VET (%)
66.8
64.7
61.2
59.7
65.7
Clinical pregnancy/VET (%)
58.6
53.4
50.8
47.9
55.7
Ongoing/delivered pregnancies (%)
51.8
45.6
40.6
37.7
45.7
Implantations
2131
932
566
264
324
Implantation rate (%)
48.6
44.5
39.3
35.9
43.8
Values are numbers, unless otherwise described
Table 5
Retrospective outcome data (2004–June 2019) at the Fertility Centers of Illinois, Chicago, from
vitrified day 6 blastocysts in regard to the patients’ age
Patient’s age (y)
Donor
<35
35–37
38–40
>40
Cycles
1382
834
704
446
203
Transfers
1374
830
701
442
202
Blastocysts survived (%)
98.4
99.2
98.7
97.5
99.7
Blastocysts transferred (mean)
1.6
1.5
1.5
1.5
1.6
Positive pregnancy/VET (%)
55.4
53.5
51.3
45.9
47.0
Clinical pregnancy/VET (%)
46.4
45.1
41.7
37.1
38.6
Ongoing/delivered pregnancies (%)
38.3
36.6
33.5
26.2
27.7
Implantations
778
447
343
183
92
Implantation rate (%)
34.7
35.1
37.2
27.7
27.8
Values are numbers, unless otherwise described
506
Juergen Liebermann