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Updated: Dec 25, 2025

Isolation of Exosome-Enriched Extracellular Vesicles Carrying Granulocyte-Macrophage Colony-Stimulating Factor from Embryonic Stem Cells
Published on: November 11, 2021
The BlastGen study: a randomized controlled trial of blastocyst media supplemented with granulocyte-macrophage
Ryan D Rose1, Michael F Barry1, Emma V Dunstan2
1Fertility SA, St Andrews Hospital, 350 South Terrace, Adelaide SA 5000, Australia; Adelaide Health and Medical Sciences, Robinson Research Institute, The University of Adelaide, AHMS Building, North Terrace, Adelaide SA 5005, Australia.
Research Question:
Does Embryogen®/BlastGen™ culture medium improve live birth rates compared with standard culture medium for women undergoing IVF and intracytoplasmic sperm injection (ICSI) with poor prognosis.
Design:
Randomized clinical trial. A total of 100 couples undergoing IVF/ICSI were randomly allocated to having their inseminated oocytes incubated in either Embryogen®/BlastGen™ sequential culture media or standard Cleavage/Blastocyst sequential culture media for 5 days (ClinicalTrials.gov Identifier: NCT02305420).
Results:
No statistically significant difference in live birth rate was found between the control group and the Embryogen®/BlastGen™ group (17 [34%] versus 11 [22%], respectively) (OR 0.55; 95% CI 0.22 to 1.32; P = 0.18). After adjustment for maternal age, body mass index and fertilization procedure, the blastulation rate reduced (40.6 ± 26.5 versus 24.6 ± 26.7; RR 0.70, CI 0.52 to 0.95; P < 0.05), and grade of the embryo transferred (OR 0.35, CI 0.16 to 0.77; P < 0.01) when Embryogen®/BlastGen™ medium was used.
Conclusion:
A significant reduction in day-5 embryo outcome parameters was found using Embryogen®/BlastGen™ compared with standard medium, and insufficient evidence of a difference in pregnancy outcomes. Taking into consideration the small samples size, study limitations and strict inclusion criteria of this single-centre study, further research is needed to determine the efficacy of Embryogen®/BlastGen™ medium in couples undergoing IVF/ICSI.
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