Note that the CDC collects statistics on assisted reproductive technology success rates. Here is the 2019 report: https://www.cdc.gov/art/reports/2019/pdf/2019-Report-ART-Fer... . See especially Figure 3 on page 29 (Percentage of embryo transfers that resulted in live-birth delivery, by patient age and egg or embryo source). There is more data, including from individual clinics, at https://www.cdc.gov/art/artdata/index.html .