ClinicalTrials.gg
RecruitingNCT06330987FANTEUpdated Mar 26, 2024

Fetal Autonomic Nervous sysTem Evaluation

An observational study in Pregnancy Related, Pregnancy Disease and Pregnancy Complications, sponsored by University of Pisa. Recruiting at 1 site in Italy. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-03-26.

Sponsored by University of Pisa · Observational

From the registry’s dates

  • Primary completion was expected by Sep 2025, 1 year 1 month ago, but the record still lists the study as recruiting.
  • Started Aug 2019; still recruiting 7 years 3 months later.

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Study type
Observational
Model
Case-crossover
Time perspective
Prospective
Enrollment
186
Ages
18 Years and older
Sex
Female
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 17 studies in Pregnancy Complications with a site in Italy — 10 open to participants now, 10 under way, none of them phase 3. Pregnancy Complications · Italy.

Planned enrollment
6th of 12
186 · median 168
Started
2019
with 1 other
Observational
12 of 17
8 open now
Registered
13th of 17
by date

Among the 17 studies in Pregnancy Complications with a site in Italy, this one is the 6th largest by planned enrollment of the 12 observational ones that give a count, is one of 2 that started in 2019, is one of 12 observational ones, and was the 13th registered.

Pregnancy Complications

411 studies on the registry are indexed under Pregnancy Complications; 113 are open to participants now.

Browse Pregnancy Complications studies →

Open to participants now

10 of the 17 studies in Pregnancy Complications with a site in Italy are open now. Recruiting first, the newest first:

4 more — sign in →

All 10 open studies →

A study can be open while its sites in Italy have not opened yet or have stopped. Only those recruiting at a site in Italy →

Who these studies take

Of the 92 Pregnancy Complications studies recruiting now, 44 (48%) set no upper age limit and 45 (49%) stop at 75 or younger; 22 take children under 18; 35 take healthy volunteers.

This study: 18 Years and older · female · healthy volunteers too.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 17 studies in Pregnancy Complications with a site in Italy, or all of them as a file.
02

Study summary

The autonomic nervous system (ANS) is involved in cardiovascular, metabolic and cognitive processes, so its study in the fetus can provide relevant functional diagnostic and prognostic information. In particular, the study of the fetal ANS allows us to understand the degree of nervous maturation reached by the fetus and any developmental disorders that could have an impact on the cardiovascular characteristics of the fetus.

The goal of this open-label, non-randomized, prospective observational study is to study the fetal ANS in pregnant women between 23 and 40 weeks of gestation.

The objetives are:

  • To Evaluate Fetal Autonomic Nervous System (FANTE) through the analysis of maternal electrocardiogram (ECG) and others clinical parameters usually used in pregnancy monitoring.
  • To identify any variations in the fetal ECG in the event of developmental or pathological maternal and/or fetal pregnancy.

Participants will be recruited during ultrasound visits, information sessions, and hospitalizations after signing informed consent.

Read the detailed description

The Autonomic Nervous System (ANS) is the main regulator of the body's homeostasis. It consists of two branches that work in balance: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The SNS is responsible for the fight-or-flight response, while the PNS is responsible for the recovery response. The coordination of their actions is vital for the body's proper functioning. The two branches of the ANS develop asynchronously during fetal development, particularly from the vagus nerve (X pair of cranial nerves) within the PNS. However, its activity is severely limited by late myelination, and the tone of the SNP undergoes a first increase at around 25-32 weeks and a second increase at 37 weeks. In contrast, SNS maturation continues steadily throughout pregnancy. It has been recognized that imbalances in the development of the SNS may underlie intrauterine death, problems adapting to extrauterine life pediatric morbidity and increased risk of sudden infant death syndrome (SIDS). Altered ANS functioning has been linked to developmental pathologies in childhood, including autism spectrum disorders and other neuropsychiatric conditions, as well as adult cardiovascular and metabolic diseases. The causes of altered autonomic development are diverse, including factors related to pregnancy and pre-existing maternal pathologies. The primary causes are premature birth, abnormalities in placenta formation and development, intrauterine growth restriction (IUGR), maternal diabetes, hypothyroidism, substance abuse, and maternal mental illness.

Given this, evaluating the extent of ASN development may have significant implications not only in the obstetric and neonatal setting, but also in the long term. Sympathetic and parasympathetic tone indicators can be studied by examining Heart Rate Variability (HRV) on an electrocardiogram (ECG). Certain parameters can be detected in HRV that indicate different facets of autonomic tone, mainly the activity of the SNS (LF band), the PNS (HF band) and the sympathetic-vagal balance (LF/HF). Obtaining these parameters, however, requires the analysis of an electrocardiographic trace, which is not easy to acquire in intrauterine life.

The collaboration between the University of Pisa and the Institute of Clinical Physiology of the National Research Council of Italy (IFC-CNR) has led to the development of the FANTE method. FANTE (Fetal Autonomic Nervous Evaluation) enables the analysis of electrocardiographic traces acquired by placing electrodes on the maternal abdomen. The traces are interpreted using an algorithm developed by researchers at IFC-CNR, enabling extraction of HRV data with the same level of accuracy as fetal magnetocardiography. In sum, this method that allows accurate extraction of fetal ECGs from multichannel maternal abdominal signals. It represents a non-invasive and affordable option, which are fundamental characteristics for screening tools.

The assessment of FANTE has the potential to serve as a basis for risk stratification in populations affected by maternal or fetal disease. This tool may prove valuable for early diagnosis, allowing planning for more rigorous prenatal monitoring and comprehensive postnatal diagnosis.

Women with a singleton pregnancy attending or admitted to the Department of Obstetrics and Gynecology will be recruited between the 24th and 37th week of pregnancy. After signing the informed consent, they will be enrolled into the study.

At recruitment visit:

  • Maternal anthropometric evaluation will be performed (age, body mass index (BMI), blood pressure smoking/alcohol/drug habits, medical therapies, or pathologies).
  • Fetal well-being evaluation will be carried out by reviewing the reports of laboratory and ultrasound screening tests.
  • The FANTE recordings will be performed using a 10-lead ECG placed on the maternal abdomen.

at FANTE periodic visit:

  • FANTE registrations will be performed weekly.
  • Standard maternal anthropometric assessments will be conducted as part of the periodic evaluations.

At delivery:

  • Mode of delivery and any complications will be assessed.
  • Within 48 hours of birth, anthropometric assessment of the infant according to clinical practice (weight, abdominal and head circumference).
03

Conditions studied

  • Pregnancy Related
  • Pregnancy Disease
  • Pregnancy Complications
  • Pre-Eclampsia
  • Gestational Diabetes
  • ECG Electrode Site Reaction
  • Fetal Growth Retardation
  • Fetal Complications

Keywords

  • FANTE
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Women with a singleton pregnancy attending or admitted to the Obstetrics and Gynecology Unit of the Santa Chiara Hospital, AOUP.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Singleton pregnancy from 23 to 40 weeks of gestation.

Exclusion criteria

Exclusion Criteria:

  • Consent withdrawal
  • Multiple pregnancy
  • Singleton pregnancy below 23 weeks or above 40 weeks of gestation
  • Contractions and signs of labor
05

Study design

Observational model
Case-crossover
Time perspective
Prospective
Enrollment
186 participants (estimated)
Patient registry
No

Interventions

  • Deviceelectrocardiograph

    Ten standard derivation electrodes were used to acquired FANTE registrations. The peripheral electrodes (Left (L), Right (R) and Foot (F)) were placed on the maternal abdomen in a triangle around the navel (orange) with lower apex, while the precordial ones (C1, C2, C3, C4, C5, C6) were put on an external circle. The Neutral electrode was on the right side of the patient abdomen. The software was configured so that the system acquired and wrote on disk 8 signals (2 bipolar and 6 referenced to the centroid of the three L, R and F leads) at 1000 sps with a resolution of 0.763uV. This high resolution is needed to resolve the very small voltage changes related to fetal cardiac activity.

    Also known as: Touch ECG HD+ (Cardioline S.p.A.)

06

What researchers measure

Primary outcomes

  1. Fetal Autonomic Nervous sysTem Evaluation (FANTE)

    The outcome measure assessed is heart rate variability (HRV), which is analyzed using the FANTE algorithm. HRV serves as an indicator of various facets of autonomic tone, including sympathetic (low frequency band, LF 0.04 - 0.15 Hz), parasympathetic (high frequency band, HF 0.15 - 0.4 Hz), and sympathetic-parasympathetic balance (LF/HF ratio) activity. Data are collected weekly, with each session lasting 10 minutes.

    Time frame: Between 23 and 40 weeks of pregnancy (Recording visit).

Secondary outcomes

  1. Maternal Assesment

    Occurrence of obesity, gestacional diabetes, habits such as smoking, alcohol, drug use, medical therapies, reports of maternal pathologies.

    Time frame: Between 23 and 37week of pregnancy (Recruitment visit).

  2. Obstetric Complications and mode of Delivery

    Occurrence of gestational hypertension, pre-eclampsia, intrauterine growth restriction, premature rupture of membranes, preterm labour. Mode of delivery (spontaneous, cesarean section, operative), neonatal weight and Apgar.

    Time frame: Recruitment visit; Recording visit; Day of the delivery, in average 16 weeks after recruitment (post-partum visit).

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Aug 2019 (actual). Primary completion is estimated for Sep 2025, 73 months after the start.

Of 113 non-industry observational studies under Pregnancy Complications, half reached primary completion within 60 months of starting (the median), counting those still running; a quarter within 30 and three quarters within 201. This study's planned 73 months is above that.

Counting every sponsor, half of 121 studies reached it within 60 months; a quarter within 30 and three quarters within 151.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 29, 2024
First posted
Mar 26, 2024
StartActual
Aug 13, 2019
Primary completionEst.
Sep 28, 2025
CompletionEst.
Dec 28, 2025
Last update
Mar 26, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 26, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06330987
Lead sponsor
University of Pisa
Collaborators
Fondazione C.N.R./Regione Toscana "G. Monasterio", Pisa, Italy
Responsible party
Paolo Mannella (Full Professor of Obstetrics and Gynecology, University of Pisa) — Principal investigator
First posted
Mar 26, 2024
Start date
Aug 13, 2019
Primary completion
Sep 28, 2025 (estimated)
Completion
Dec 28, 2025 (estimated)
Last update
Mar 26, 2024

Study contacts

Paolo Mannella, MD. PhD.
Contact
paolo.mannella@unipi.it
0039.050.993523
Paolo Mannella, MD. PhD.
principal investigator · Department of Clinical and Experimental Medicine. University of Pisa

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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