Cumulative live birth rates over multiple complete cycles of in vitro fertilisation cycles: ten-year cohort study of 20687 women following freeze-all strategy
Background For patients embarking on in vitro fertilization (IVF) or Intracytoplasmic sperm injection (ICSI), one of the most concerned problems is their chance of a live-birth. The cumulative live birth rate (CLBR) after IVF has been reported in recent years; however these studies were all about conventional IVF strategy, the CLBRs following freeze-all strategy has not been reported. Methods This was a retrospective cohort study. A total of 20687 women undergoing their first and following IVF
... and following IVF cycles during the period from January 1, 2007 through March 31, 2016 were included in this study. The primary Outcomes of the present study were presented in three types: the live birth rate per complete cycle, the conservative CLBR and the optimal CLBR. Results The CLBR increased from 50.74% for the first complete cycle to 64.41% after seven complete cycles,and varied by age category. The CLBR after five complete cycles declined from 77.11% for women younger than 31 years, to 8.63% for women older than 40 years. The predictors of live birth over multiple complete cycles for patients embarking on IVF following freeze-all strategy were women's age and causes of infertility. In the model constructed for patients finishing the first complete cycle, the number of oocyte retrieved at complete cycle one also played an important predictive role. Conclusions Among women undergoing IVF following freeze-all strategy, the CLBR after seven complete IVF cycles was 84.77% if there were no barriers to continue the IVF treatment, with variation by age. Two prediction models were developed to estimate their probability of having a baby over multiple complete IVF cycles with freeze-all strategy among patients before starting IVF and patients after the first complete cycle, which is critical for patients to make treatment decisions and preparations physically, emotionally and financially.