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At the first oocyte pickup (OPU), 12 out of 13 patients received oocytes, and 11 out of 13 received oocytes at the second OPU. Four patients (Patients 6, 7, 10, and 13) were able to cryopreserve embryos derived from the second OPU. Among them, a pregnancy was confirmed for Patient 4. 〇: oocytes that could be cryopreserved; 
: retrieved oocytes on the first OPU; 
: retrieved oocytes on the second OPU
