E. Chandraharan and S. Arulkumaran, Prevention of birth asphyxia: responding appropriately to cardiotocograph (CTG) traces, Best Practice & Research Clinical Obstetrics & Gynaecology, vol.21, issue.4, pp.609-624, 2007.
DOI : 10.1016/j.bpobgyn.2007.02.008

G. Macones, G. Hankins, C. Spong, J. Hauth, and T. Moore, The 2008 National Institute of Child Health and Human Development Workshop Report on Electronic Fetal Monitoring, Obstetrics & Gynecology, vol.112, issue.3, pp.661-666, 2008.
DOI : 10.1097/AOG.0b013e3181841395

Z. Alfirevic, D. Devane, and G. Gyte, Continuous cardiotocography (CTG) as a form of electronic fetal monitoring (EFM) for fetal assessment during labour, Cochrane Database Syst Rev, vol.3, issue.3, pp.6066-16856111, 2006.

J. Larma, A. Silva, C. Holcroft, R. Thompson, P. Donohue et al., Intrapartum electronic fetal heart rate monitoring and the identification of metabolic acidosis and hypoxic-ischemic encephalopathy, American Journal of Obstetrics and Gynecology, vol.197, issue.3, 2007.
DOI : 10.1016/j.ajog.2007.06.053

G. Dawes, M. Moulden, and C. Redman, Short-term fetal heart rate variation, decelerations, and umbilical flow velocity waveforms before labor, Obstet Gynecol, vol.80, issue.4, pp.673-678, 1992.

J. Low, R. Victory, and E. Derrick, Predictive Value of Electronic Fetal Monitoring for Intrapartum Fetal Asphyxia With Metabolic Acidosis, Obstetrics & Gynecology, vol.93, issue.2, pp.285-291, 1999.
DOI : 10.1097/00006250-199902000-00024

F. Figueras, S. Albela, S. Bonino, M. Palacio, E. Barrau et al., Visual analysis of antepartum fetal heart rate tracings: inter- and intra-observer agreement and impact of knowledge of neonatal outcome, Journal of Perinatal Medicine, vol.33, issue.3, pp.241-245, 2005.
DOI : 10.1515/JPM.2005.044

S. Chauhan, C. Klauser, T. Woodring, M. Sanderson, E. Magann et al., Intrapartum nonreassuring fetal heart rate tracing and prediction of adverse outcomes: interobserver variability, American Journal of Obstetrics and Gynecology, vol.199, issue.6, 2008.
DOI : 10.1016/j.ajog.2008.06.027

C. Vayssiere, V. Tsatsaris, O. Pirrello, C. Cristini, C. Arnaud et al., Inter-observer agreement in clinical decision-making for abnormal cardiotocogram (CTG) during labour: a comparison between CTG and CTG plus STAN, BJOG: An International Journal of Obstetrics & Gynaecology, vol.115, issue.8, pp.1081-1088, 2009.
DOI : 10.1111/j.1471-0528.2009.02204.x

T. Rantonen, E. Ekholm, S. Siira, T. Metsälä, R. Leino et al., Periodic spectral components of fetal heart rate variability reflect the changes in cord arterial base deficit values: a preliminary report, Early Human Development, vol.60, issue.3, pp.233-238, 2001.
DOI : 10.1016/S0378-3782(00)00124-9

D. Chung, Y. Sim, K. Park, S. Yi, J. Shin et al., Spectral analysis of fetal heart rate variability as a predictor of intrapartum fetal distress, International Journal of Gynecology & Obstetrics, vol.14, issue.(2), pp.109-116, 2001.
DOI : 10.1016/S0020-7292(01)00348-4

S. Siira, T. Ojala, T. Vahlberg, J. Jalonen, I. Välimäki et al., Marked fetal acidosis and specific changes in power spectrum analysis of fetal heart rate variability recorded during the last hour of labour, BJOG: An International Journal of Obstetrics and Gynaecology, vol.86, issue.4, pp.418-423, 2005.
DOI : 10.1097/00000539-199903000-00021

E. Salamalekis, E. Hintipas, I. Salloum, G. Vasios, C. Loghis et al., Computerized analysis of fetal heart rate variability using the matching pursuit technique as an indicator of fetal hypoxia during labor, The Journal of Maternal-Fetal & Neonatal Medicine, vol.87, issue.4504, pp.165-169, 2006.
DOI : 10.1080/14767050500233290

J. Van-laar, M. Porath, C. Peters, and S. Oei, Spectral analysis of fetal heart rate variability for fetal surveillance: review of the literature, Acta Obstetricia et Gynecologica Scandinavica, vol.87, issue.3, pp.300-306, 2008.
DOI : 10.1080/00016340801898950

J. Van-laar, C. Peters, R. Vullings, S. Houterman, J. Bergmans et al., Fetal autonomic response to severe acidaemia during labour, BJOG: An International Journal of Obstetrics & Gynaecology, vol.540, issue.Suppl. 9, pp.429-437, 2010.
DOI : 10.1111/j.1471-0528.2009.02456.x

S. Siira, T. Ojala, T. Vahlberg, K. Rosén, and E. Ekholm, Do spectral bands of fetal heart rate variability associate with concomitant fetal scalp pH? Early Hum Dev, pp.739-742, 2013.

J. Kwon, I. Park, J. Shin, J. Song, R. Tafreshi et al., Specific change in spectral power of fetal heart rate variability related to fetal acidemia during labor: Comparison between preterm and term fetuses, Early Human Development, vol.88, issue.4, pp.203-207
DOI : 10.1016/j.earlhumdev.2011.08.007

H. Huikuri and P. Stein, Heart Rate Variability in Risk Stratification of Cardiac Patients, Progress in Cardiovascular Diseases, vol.56, issue.2, pp.153-159, 2013.
DOI : 10.1016/j.pcad.2013.07.003

S. Akselrod, D. Gordon, F. Ubel, D. Shannon, A. Berger et al., Power spectrum analysis of heart rate fluctuation: a quantitative probe of beat-to-beat cardiovascular control, Science, vol.213, issue.4504, pp.220-222, 1981.
DOI : 10.1126/science.6166045

L. Doi, Task-Force. Heart rate variability. Standards of measurement, physiological interpretation, and clinical use. Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology, Eur Heart J, vol.20, issue.173, pp.354-381, 1996.

A. Anwar, S. Allen, N. Virag, R. Sutton, P. De-mellis et al., 2???Sympatho-Vagal Balance Derived from Heart Rate Variability During External and Implantable ECG Monitoring May ???Reveal??? the Underlying Cause of Blackouts, Heart, vol.100, issue.Suppl 3, pp.10-1136
DOI : 10.1136/heartjnl-2014-306118.2

P. Van-leeuwen, D. Geue, S. Lange, W. Hatzmann, and D. Grönemeyer, Changes in the frequency power spectrum of fetal heart rate in the course of pregnancy, Prenatal Diagnosis, vol.56, issue.11, pp.909-916, 2003.
DOI : 10.1002/pd.723

J. Fortrat, Inaccurate normal values of heart rate variability spectral analysis in newborn infants, The American Journal of Cardiology, vol.90, issue.3, pp.346-356, 2002.
DOI : 10.1016/S0002-9149(02)02399-8

M. Koome, L. Bennet, L. Booth, J. Davidson, G. Wassink et al., Ontogeny and control of the heart rate power spectrum in the last third of gestation in fetal sheep, Experimental Physiology, vol.156, issue.Suppl, pp.80-88, 2014.
DOI : 10.1113/expphysiol.2013.074567

D. Francis, K. Willson, P. Georgiadou, R. Wensel, L. Davies et al., Physiological basis of fractal complexity properties of heart rate variability in man, The Journal of Physiology, vol.23, issue.2, pp.619-629, 2002.
DOI : 10.1113/jphysiol.2001.013389

P. Ivanov, Scale-Invariant Aspects of Cardiac Dynamics Across Sleep Stages and Circadian Phases, IEEE Engineering in Medicine and Biology Magazine, vol.26, issue.6, pp.33-37, 2007.
DOI : 10.1109/EMB.2007.907093

T. Nakamura, H. Horio, and Y. Chiba, Local H??lder Exponent Analysis of Heart Rate Variability in Preterm Infants, IEEE Transactions on Biomedical Engineering, vol.53, issue.1, pp.83-88, 2006.
DOI : 10.1109/TBME.2005.859796

C. Tan, M. Cohen, D. Eckberg, and J. Taylor, Fractal properties of human heart period variability: physiological and methodological implications, The Journal of Physiology, vol.269, issue.Suppl 1, pp.3929-3941, 2009.
DOI : 10.1113/jphysiol.2009.169219

M. Doret, H. Helgason, P. Abry, P. Gonçalvès, C. Gharib et al., Multifractal Analysis of Fetal Heart Rate Variability in Fetuses with and without Severe Acidosis during Labor, American Journal of Perinatology, vol.28, issue.04, pp.259-266, 2011.
DOI : 10.1055/s-0030-1268713
URL : https://hal.archives-ouvertes.fr/inria-00537788

P. Abry, S. Roux, V. Chudá?ek, P. Borgnat, P. Gonçalvès et al., Hurst exponent and intrapartum fetal heart rate: Impact of decelerations, Proceedings of the 26th IEEE International Symposium on Computer-Based Medical Systems, pp.1-6
DOI : 10.1109/CBMS.2013.6627777

P. Abry, P. Gonçalvès, and P. Flandrin, Wavelets, spectrum estimation and 1/f processes, Wavelets and Statistics, Lecture Notes in Statistics, vol.103, 1995.

D. Veitch and P. Abry, A wavelet-based joint estimator of the parameters of long-range dependence, IEEE Transactions on Information Theory, vol.45, issue.3, pp.878-897, 1999.
DOI : 10.1109/18.761330

M. Doret, M. Massoud, A. Constans, and P. Gaucherand, Use of peripartum ST analysis of fetal electrocardiogram without blood sampling: a large prospective cohort study, European Journal of Obstetrics & Gynecology and Reproductive Biology, vol.156, issue.1, pp.35-40, 2011.
DOI : 10.1016/j.ejogrb.2010.12.042

I. Amer-wåhlin, C. Hellsten, H. Norén, H. Hagberg, A. Herbst et al., Cardiotocography only versus cardiotocography plus ST analysis of fetal electrocardiogram for intrapartum fetal monitoring: a Swedish randomised controlled trial, The Lancet, vol.358, issue.9281, pp.534-538, 2001.
DOI : 10.1016/S0140-6736(01)05703-8

R. Victory, D. Penava, O. Silva, R. Natale, and B. Richardson, Umbilical cord pH and base excess values in relation to adverse outcome events for infants delivering at term, American Journal of Obstetrics and Gynecology, vol.191, issue.6, pp.2021-2028, 2004.
DOI : 10.1016/j.ajog.2004.04.026

N. Prabhakar, Sensing hypoxia: physiology, genetics and epigenetics. The Journal of physiology, pp.2245-2257, 2013.

J. Pardey, M. Moulden, and C. Redman, A computer system for the numerical analysis of nonstress tests, American Journal of Obstetrics and Gynecology, vol.186, issue.5
DOI : 10.1067/mob.2002.122447

M. Costa, W. Schnettler, C. Amorim-costa, J. Bernardes, A. Costa et al., Complexity-loss in fetal heart rate dynamics during labor as a potential biomarker of acidemia, Early Human Development, vol.90, issue.1, pp.67-71, 2014.
DOI : 10.1016/j.earlhumdev.2013.10.002

V. Chudáek, J. Spilka, P. Jank?, M. Koucký, L. Lhotská et al., Automatic evaluation of intrapartum fetal heart rate recordings: a comprehensive analysis of useful features, Physiological Measurement, vol.32, issue.8, pp.1347-1360, 2011.
DOI : 10.1088/0967-3334/32/8/022

L. Doi, Fetal Heart Rate Variability Analysis: Hurst Parameter versus, 2015.

J. Kwon, I. Park, J. Lim, and J. Shin, Changes in spectral power of fetal heart rate variability in small-forgestational-age fetuses are associated with fetal sex, Early Human Development, vol.90, issue.1, p.24332839, 2014.

R. Leonarduzzi, M. Torres, and P. Abry, Scaling range automated selection for wavelet leader multifractal analysis, Signal Processing, vol.105, issue.0, pp.243-257, 2014.
DOI : 10.1016/j.sigpro.2014.06.002

T. Ohta, K. Okamura, Y. Kimura, T. Suzuki, T. Watanabe et al., Alteration in the Low-Frequency Domain in Power Spectral Analysisof Fetal Heart Beat Fluctuations, Fetal Diagnosis and Therapy, vol.14, issue.2, pp.92-97, 1999.
DOI : 10.1159/000020896

M. Signorini, G. Magenes, S. Cerutti, and D. Arduini, Linear and nonlinear parameters for the analysis of fetal heart rate signal from cardiotocographic recordings, IEEE Transactions on Biomedical Engineering, vol.50, issue.3, pp.365-374, 2003.
DOI : 10.1109/TBME.2003.808824

L. Oppenheimer and R. Lewinsky, 7 Power spectral analysis of fetal heart rate, Bailli??re's Clinical Obstetrics and Gynaecology, vol.8, issue.3, pp.643-661, 1994.
DOI : 10.1016/S0950-3552(05)80203-2

M. Cohen and J. Taylor, Short-term cardiovascular oscillations in man: measuring and modelling the physiologies, The Journal of Physiology, vol.75, issue.3, pp.669-683, 2002.
DOI : 10.1113/jphysiol.2002.017483

D. Goldstein, O. Bentho, M. Park, and Y. Sharabi, Low-frequency power of heart rate variability is not a measure of cardiac sympathetic tone but may be a measure of modulation of cardiac autonomic outflows by baroreflexes, Experimental Physiology, vol.293, issue.12, pp.1255-1261, 2011.
DOI : 10.1113/expphysiol.2010.056259

U. Schneider, E. Schleussner, A. Fiedler, S. Jaekel, M. Liehr et al., Fetal heart rate variability reveals differential dynamics in the intrauterine development of the sympathetic and parasympathetic branches of the autonomic nervous system, Physiological Measurement, vol.30, issue.2, pp.215-226, 2009.
DOI : 10.1088/0967-3334/30/2/008

K. Gustafson, J. Allen, H. Yeh, and L. May, Characterization of the fetal diaphragmatic magnetomyogram and the effect of breathing movements on cardiac metrics of rate and variability. Early Hum Dev, pp.467-475, 2011.

L. Ribbert, G. Visser, E. Mulder, M. Zonneveld, L. Morssink et al., Changes with time in fetal heart rate variation, movement incidences and haemodynamics in intrauterine growth retarded fetuses: a longitudinal approach to the assessment of fetal well being, Early Human Development, vol.31, issue.3, pp.195-208, 1993.
DOI : 10.1016/0378-3782(93)90195-Z

J. Kantelhardt, S. Zschiegner, E. Koscielny-bunde, S. Havlin, A. Bunde et al., Multifractal detrended fluctuation analysis of nonstationary time series. Physica A: Statistical Mechanics and its Applications, pp.87-114, 2002.

H. Gonçalves, J. Bernardes, A. Rocha, and D. De-campos, Linear and nonlinear analysis of heart rate patterns associated with fetal behavioral states in the antepartum period. Early Hum Dev, pp.585-591, 2007.

M. David, M. Hirsch, K. J. Toledo, E. Akselrod, and S. , An estimate of fetal autonomic state by time-frequency analysis of fetal heart rate variability, Journal of Applied Physiology, vol.102, issue.3, pp.1057-1064, 1985.
DOI : 10.1152/japplphysiol.00114.2006

V. Chudá?ek, J. Anden, S. Mallat, P. Abry, and M. Doret, Scattering Transform for Intrapartum Fetal Heart Rate Variability Fractal Analysis: A Case-Control Study, IEEE Transactions on Biomedical Engineering, vol.61, issue.4, pp.1100-1108, 2014.
DOI : 10.1109/TBME.2013.2294324