J. Alder, N. Fink, J. Bitzer, I. Hosli, and W. Holzgreve, Depression and anxiety during pregnancy: A risk factor for obstetric, fetal and neonatal outcome? A critical review of the literature, The Journal of Maternal-Fetal & Neonatal Medicine, vol.67, issue.4, pp.189-209, 2007.
DOI : 10.1080/01674820412331282231

N. Talge, C. Neal, and V. Glover, Antenatal maternal stress and long-term effects on child neurodevelopment: how and why?, Journal of Child Psychology and Psychiatry, vol.169, issue.3-4, pp.245-253, 2007.
DOI : 10.1196/annals.1314.007

J. Martini, S. Knappe, K. Beesdo-baum, R. Lieb, and H. Wittchen, Anxiety disorders 10 before birth and self-perceived distress during pregnancy: associations with maternal 11 depression and obstetric, neonatal and early childhood outcomes, Early Hum Dev, vol.12, issue.4, pp.305-310, 2010.

R. Hanss, B. Bein, and H. Francksen, Heart rate variability-guided prophylactic 14 treatment of severe hypotension after subarachnoid block for elective caesarean 15 delivery Heart rate variability predicts severe 17 hypotension after spinal anesthesia Heart rate variability predicts severe 19 hypotension after spinal anesthesia for elective caesarean delivery Hemodynamic profile of 25 stress-induced anticipation and recovery, Manual for 22 the State-Trait Anxiety Inventory (STAI) Form Y. Palo Alto, pp.635-643, 1983.

B. Leighton, M. Norris, C. Desimone, M. Darby, and H. Menduke, Pre-eclamptic 27 and healthy term pregnant patients have different chronotropic responses to 28 isoproterenol al. Stress-induced changes in human 30 salivary alpha-amylase activity --associations with adrenergic activity, Anesthesiology Nater UM Psychoneuroendocrinology, vol.72, issue.32, pp.392-393, 1990.

R. Chatterton, J. Vogelsong, K. Lu, Y. Ellman, A. Hudgens et al., Salivary 33 alpha-amylase as a measure of endogenous adrenergic activity, Clin Physiol, vol.34, issue.35, pp.433-448, 1996.

R. Chatterton, J. Vogelsong, K. Lu, Y. Hudgens, and G. , Hormonal responses 36 to psychological stress in men preparing for skydiving, J Clin Endocrinol Metab, vol.37, issue.38, pp.2503-2509, 1997.

Y. Noto, T. Sato, M. Kudo, K. Kurata, and K. Hirota, The relationship between salivary 39 biomarkers and state-trait anxiety inventory score under mental arithmetic stress: a 40 pilot study, Anesth Analg, vol.101, issue.41, pp.1873-1876, 2005.

N. Takai, M. Yamaguchi, T. Aragaki, K. Eto, K. Uchihashi et al., Effect of psychological stress on the salivary cortisol and amylase levels in healthy young adults, Archives of Oral Biology, vol.49, issue.12, pp.963-968, 2004.
DOI : 10.1016/j.archoralbio.2004.06.007

N. Rohleder, J. Wolf, E. Maldonado, C. Kirschbaum, A. Bratsikas et al., The psychosocial stress- 45 induced increase in salivary alpha-amylase is independent of saliva flow rate. 46 48 Prolonged salivary cortisol recovery in second-trimester pregnant women and 49 attenuated salivary alpha-amylase responses to psychosocial stress in human 1 pregnancy, Psychophysiology J Clin Endocrinol Metab, vol.43, issue.2, pp.645-652, 2006.

F. Omar, G. Van-der-watt, and T. Pillay, Reference change values: how useful are they?, Journal of Clinical Pathology, vol.61, issue.4, pp.426-427, 2008.
DOI : 10.1136/jcp.2007.054833

E. Harris and T. Yasaka, On the calculation of a "reference change" for comparing 5 two consecutive measurements, Clin Chem, vol.29, issue.6, pp.25-30, 1983.

N. Rohleder and U. Nater, Determinants of salivary ??-amylase in humans and methodological considerations, Psychoneuroendocrinology, vol.34, issue.4, pp.469-485, 2009.
DOI : 10.1016/j.psyneuen.2008.12.004

K. Lorentz, Approved recommendation on IFCC methods for the measurement 9 of catalytic concentration of enzymes. Part 9. IFCC method for alpha-amylase (1,4- 10 alpha-D-glucan 4-glucanohydrolase, EC 3.2.1.1). International Federation of Clinical 11 Chemistry and Laboratory Medicine (IFCC) Committee on Enzymes, Clin Chem Lab 12 Med, vol.36, issue.21, pp.185-203, 1998.

S. Gras, F. Servin, and E. Bedairia, The effect of preoperative heart rate and 14 anxiety on the propofol dose required for loss of consciousness Measurement of plasma catecholamine 17 concentrations. An assessment of anxiety Salivary alpha-amylase as a non-invasive biomarker 19 for the sympathetic nervous system: current state of research, al. Variability of N-terminal 22 probrain natriuretic peptide in stable chronic heart failure and its relation to changes 23 in clinical variables, pp.89-93, 1823.

M. Yamaguchi, M. Deguchi, and J. Wakasugi, Hand-held monitor of sympathetic nervous system using salivary amylase activity and its validation by driver fatigue assessment, Biosensors and Bioelectronics, vol.21, issue.7, pp.1007-1014, 2006.
DOI : 10.1016/j.bios.2005.03.014