Do Fertility Treatments Raise Infant Heart Defect Risks?

Fertility treatments have helped millions of couples worldwide achieve parenthood. However, concerns regarding the safety of assisted reproductive technology (ART) often worry prospective parents. Specifically, previous studies link these advanced treatments to a major congenital heart defect risk. Consequently, researchers wanted to determine if these procedures also elevate the risk of minor cardiac anomalies. Ultimately, a landmark cohort study from the Copenhagen Baby Heart Study brings reassuring news for families and clinicians alike.

Assessing Congenital Heart Defect Risks in ART Infants

Indeed, the researchers designed a rigorous prospective cohort study to evaluate minor cardiac issues. Therefore, they analyzed data from 23,493 infants within the Copenhagen Baby Heart Study. From this cohort, 1,630 singleton infants resulted from ART. Subsequently, scientists matched these infants with 6,520 spontaneously conceived controls based on maternal age and sex. Additionally, pediatric cardiologists performed neonatal transthoracic echocardiography within 60 days of birth. Thus, they could reliably diagnose ventricular and atrial septal defects.

Key Findings and Clinical Reassurance

Importantly, the results showed no significant difference in the risk of minor heart anomalies between the two groups. In fact, the adjusted odds ratio for minor cardiac defects stood at a reassuring 1.07. Furthermore, the risk remained statistically similar across all specific subtypes of assisted reproduction. For example, fresh embryo transfers and frozen-embryo transfers showed no elevated risk. Likewise, intracytoplasmic sperm injection showed no increased hazard compared to spontaneous conception. Ultimately, these findings indicate that fertility treatments do not pose a threat of subclinical minor cardiac anomalies.

Frequently Asked Questions

Q1: Does assisted reproductive technology increase the risk of minor congenital heart defects?

No, the latest clinical evidence shows no increased risk of minor heart defects in singletons conceived via ART. Therefore, parents can feel reassured about the safety of these procedures.

Q2: What minor heart defects did the Copenhagen Baby Heart Study evaluate?

Specifically, the researchers assessed ventricular septal defects, atrial septal defects, and bicuspid aortic valves using echocardiography. Furthermore, they found no significant differences between the ART and control groups.

Q3: Did different ART techniques show varying levels of risk for minor cardiac defects?

In fact, all techniques showed similar safety profiles. Consequently, procedures like fresh or frozen embryo transfers and ICSI do not carry any elevated risks for these minor anomalies.

References

1. Kyhl-Svart F et al. Risk of minor congenital heart defect in infants conceived via assisted reproductive technology: cohort study from the Copenhagen Baby Heart Study. Ultrasound Obstet Gynecol. 2026 Jun 01. doi: 10.1002/uog.70246. PMID: 42223195.
2. Sargisian N, Petzold M, Furenäs E, et al. Congenital heart defects in children born after assisted reproductive technology: a CoNARTaS study. Eur Heart J. 2024 Oct 07. doi: 10.1093/eurheartj/ehae572.
3. Galdini A, Fesslova V, Gaeta G, et al. Prevalence of Congenital Heart Defects in Pregnancies Conceived by Assisted Reproductive Technology: A Cohort Study. Children (Basel). 2021 Nov 18;8(11):1059. doi: 10.3390/children8111059.