Comparison of live birth rate between frozen-thawed single and double cleavage-stage embryo transfer and single blastocyst transfer in advanced age females and related influencing factors
CONG Yanyan, SHEN Xi, KUANG Yanping
Journal of Diagnostics Concepts & Practice . 2020, (1): 50 -54 .  DOI: 10.16150/j.1671-2870.2020.01.011