Impact of Oxygen Concentration on Human Blastocyst Development – RBMO
Reproductive BioMedicine Online shared a post on LinkedIn:
“New Hot Topic paper, selected by our Editors Mina Alikani and Richard Anderson.
Effect of constant (5%) versus gradient (8% to 2%) oxygen concentration on human blastocyst development: a sibling oocyte study by Peter Slatinšek, Milan Reljič, and Borut Kovačič․
Our Editors say:
‘Is mimicking in vivo oxygen conditions a better approach to embryo culture in vitro? Not according to this carefully designed and executed study. Can the potential interaction between culture media and oxygen levels explain these results?’
This prospective sibling-split study of 658 cumulus-oocyte complexes from 44 ICSI cycles shows that gradually lowering oxygen from 8% to 2% during the second half of embryo culture resulted in delayed blastulation and fewer clinically used blastocysts when compared with culture under static 5% oxygen.
Our Hot Topic papers are made free to read. Read it in full from issue 52.1, now․”
Title: Effect of constant (5%) versus gradient (8%–2%) oxygen concentration on sibling human blastocyst development
Authors: Peter Slatinšek, Milan Reljič, and Borut Kovačič

Stay updated on all scientific advances in the field of fertility with Fertility News.
-
May 1, 2026, 03:13International Expert Recommendations in Emerging Reproductive Science – ESHRE
-
Apr 30, 2026, 18:45AI in Ultrasound Follicular Monitoring Moves Toward Clinical Decision Support – RBMO
-
Apr 30, 2026, 11:42ASRM Encourages Registration for Conference on Practice Growth and Innovation
-
Apr 30, 2026, 11:26ESHRE and ALPHA Launch Global Survey to Update ART Laboratory KPIs
-
Apr 30, 2026, 11:10Susanne Johnson: Advanced Gynaecology Ultrasound Course Day 2
-
Apr 30, 2026, 11:02Platelets Reduce Oxidative Stress Damage in Human Endometrial Stromal Cells in Vitro – RBMO
-
Apr 30, 2026, 10:57GREEG Day 2026: Elevate Your Ultrasound Expertise – GREEG
-
Apr 30, 2026, 10:49Up to Two-Thirds of Elite Female Athletes Experience Irregular Periods – Fertility Plus
-
Apr 30, 2026, 10:47Applications for the ESHRE5 Young Ambassadors 2026 are Still OPEN, But Not for Long! – ESHRE
