1. Extended culture of vitrified–warmed embryos in day-3 embryo transfer cycles: a randomized controlled pilot study 
Rentao Jin, Xianhong Tong, Limin Wu, Lihua Luo, Hongbing Luan, Guixiang Zhou, Lars Johansson, Yusheng Liu 
Reproductive BioMedicine Online 
Volume 26, Issue 4, Pages (April 2013)
DOI: /j.rbmo
Copyright © 2012 Reproductive Healthcare Ltd. Terms and Conditions

2. Figure 1
Schematic representation of the trial protocol. All embryos were cryopreserved on day 3 of the fresh cycles. In the extended culture group, embryos were warmed on day 2 of progesterone supplementation, cultured overnight and then transferred (at day 4 of preimplantation development). In the control group, embryos were warmed on day 3 of progesterone supplementation and transferred within 2h of warming (at day 3 of preimplantation development). ET=embryo transfer.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
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3. Figure 2 CONSORT statement flow diagram.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
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4. Figure 3
Implantation rates in the EC group according to the cell stage of transferred embryos. Only cycles in which all the transferred embryos were at the same developmental stage were included. n=number of embryos transferred. ∗P<0.05; ∗∗P<0.01. R×C contingency table analysis is adopted by chi-squared tests. Because P<0.05 (P=0.006), a modified chi-squared statistic is applied for further testing within each subject.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2012 Reproductive Healthcare Ltd. Terms and Conditions