IVF success rates are reported as live birth rates per embryo transfer. For patients using their own eggs, the rate averages 32% per transfer for women under 35, 25% for women aged 35-37, 17% for women aged 38-39, and 8% for women over 42 (HFEA 2021 data). Donor egg IVF consistently achieves 35-40% per transfer regardless of recipient age, because donor age at egg collection determines embryo quality.
The role of cryopreservation quality
Post-thaw embryo survival — a direct function of vitrification protocol quality and storage vessel integrity — directly affects frozen transfer success rates. Clinics using validated cryopreservation equipment and consumables consistently achieve post-thaw survival rates above 90%. Cryolab supplies cryopreservation equipment to fertility clinics worldwide.
Cryolab supplies cryopreservation equipment and consumables to fertility clinics worldwide. Visit cryolab.co.uk or call 01243 781 121.
