repeated frozen-thawed embryo transfer
Conditions
Interventions
Once-cryopreservation embryo transfer cycle group (cryopreservation group, single frozen-thawed times before transferred):None
Repeated cryopreservation embryo transfer cycle group (re-cryopreservation group, double frozen-thawed times before transferred):None
Sponsors
PEKING UNIVERSITY SHENZHEN HOSPITAL
Eligibility
Sex/Gender
Female
Age
18 Years to 45 Years
Inclusion criteria
Inclusion criteria: 1.All FET cycles without cancelation after embryo warmed from the period between January 1, 2018 and December 31, 2022, in our reproductive medicine center were assessed.
Exclusion criteria
Exclusion criteria: 1. female age >45 years, (2) triple-or-more-cryopreserved embryo transfer cycles, (3) preimplantation genetic testing (PGT) cycles, (4)couples with chromosomal abnormalities, (5) patients with IVF/ICSI performed before in other hospitals, (6) uterine abnormalities (including bicornuate uterus, unicornuate uterus, etc.), (7) error of patient ART number or missing final IVF/ICSI outcomes, (8) the transfer cycles of twice-cryopreserved embryo mixed with fresh embryo or once-cryopreserved embryo or slow-freezing embryo.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Clinical pregnancy rate; | — |
Secondary
| Measure | Time frame |
|---|---|
| Embryo survival rate, embryo implantation rate, live birth rate, miscarriage rate, low birth weight rate, and preterm delivery rate;Maternal complications of gestational hypertension disease rate, congenital anomalies rate, stillbirth rate; | — |
Countries
China
Contacts
Public ContactHuang Zengshu
PEKING UNIVERSITY SHENZHEN HOSPITAL
Outcome results
None listed