In vitro fertilisation and vitrification disrupt embryo mitochondrial function and redox balance that persists into adulthood in mice

Verdict. ART conceived young offspring show altered cardiovascular phenotypes, including cardiac remodelling and raised blood pressure, but the mechanisms remain unclear. It intersects mitochondrial stress/dysfunction themes (mitochondrial dysfunction; reactive oxygen species; cell death).

What the authors report

Background: and aims Assisted reproductive technologies (ART), including in vitro fertilisation (IVF), account for over 10 million births worldwide. Mitochondrial disturbance during preimplantation development may link early ART exposure to later cardiac dysfunction.

Key results stated in the abstract include the following. ART conceived young offspring show altered cardiovascular phenotypes, including cardiac remodelling and raised blood pressure, but the mechanisms remain unclear. However, to our knowledge, no one has assessed mitochondrial function in adult offspring from IVF pregnancies. In the adult offspring, high resolution respirometry of isolated mitochondria from left ventricle revealed reduced oxidative phosphorylation capacity with an increased H2O2 production, altered OXPHOS subunit abundance and reduced complex I, III and IV activities.

Why it matters for mitochondrial biology

Within mitochondrial research, this work maps primarily to OXPHOS, apoptosis, redox biology, metabolism. It is relevant to mitochondrial dysfunction discourse because the abstract invokes mitochondrial dysfunction, reactive oxygen species, cell death, bioenergetics. That does not by itself establish a validated disease mechanism; it indicates thematic proximity. OXPHOS/ETC involvement, if confirmed, would place the work in the core of bioenergetic pathophysiology rather than peripheral organelle biology. Server: biorxiv. Posted 2026-08-15. Synthesis confidence is bounded by abstract completeness.

Study design (abstract-level)

Background: and aims Assisted reproductive technologies (ART), including in vitro fertilisation (IVF), account for over 10 million births worldwide. ART conceived young offspring show altered cardiovascular phenotypes, including cardiac remodelling and raised blood pressure, but the mechanisms remain unclear.

Principal findings

1. ART conceived young offspring show altered cardiovascular phenotypes, including cardiac remodelling and raised blood pressure, but the mechanisms remain unclear.
2. However, to our knowledge, no one has assessed mitochondrial function in adult offspring from IVF pregnancies.
3. In the adult offspring, high resolution respirometry of isolated mitochondria from left ventricle revealed reduced oxidative phosphorylation capacity with an increased H2O2 production, altered OXPHOS subunit abundance and reduced complex I, III and IV activities.
4. Conclusions IVF and vitrification impose distinct disturbance on preimplantation embryo redox states and bioenergetics, and this early disturbance is followed into adulthood with a reduced mitochondrial aerobic capacity and increased basal ROS production.
5. These results have important implications for IVF practices and suggest that mitochondria may be permanently programmed by this procedure.

Limitations of this brief

• This Mitos brief is an abstract-level synthesis of a preprint; it is not peer review and not a substitute for reading the full paper.
• Preprint status: findings may change with revision or journal review.
• Effect sizes, n numbers, statistics, and full experimental controls are typically incomplete at abstract resolution.
• Comparator/control language is weak or absent in the abstract, limiting causal inference from this brief alone.
• Evidence appears non-human or in vitro from the abstract; translational claims require independent scrutiny.
• Primary source: biorxiv DOI 10.64898/2026.08.14.744765 (posted 2026-08-15).

Open scientific questions

• Which specific experimental panels in the full paper establish the strongest causal claim, and how robust are the controls?
• Are OXPHOS defects primary drivers or secondary consequences of broader cellular stress?
• How do these findings sit relative to prior literature on the same pathway—replication, contradiction, or incremental extension?

Bottom line

For mitochondrial biologists focused on OXPHOS, apoptosis, redox biology, this preprint is worth full-text review soon. Abstract-level takeaway: ART conceived young offspring show altered cardiovascular phenotypes, including cardiac remodelling and raised blood pressure, but the mechanisms remain unclear. Confirm methods, effect sizes, and controls in the full PDF before citing the result as established.

Bibliographic record

Abstract-based editorial synthesis by Mitos. Not peer review.