References
- Reinhard J, Hayes-gill BR, Yi Q, et al. Comparison of non-invasive fetal electrocardiogram to Doppler cardiotocogram during the 1st stage of labor. J Perinat Med 2010;38:179–85
- Sato N, Hoshiai T, Ito T, et al. Successful detection of the fetal electrocardiogram waveform changes during various states of singletons. Tohoku J Exp Med 2011;225:89–94
- Ribbert LSM, Fidler V, Visser GHA. Computer-assisted analysis of normal second trimester fetal heart rate patterns. J Perinat Med 1991;19:53–9
- Porges SW, Furman SA. The early development of the autonomic nervous system provides a neural platform for social behaviour: a polyvagal perspective. Infant Child Dev 2011;20:106–18
- Sorokin Y, Dierker LJ, Pillay SK, et al. The association between fetal heart rate patterns and fetal movements in pregnancies between 20 and 30 weeks’ gestation. Am J Obstet Gynecol 1982;143:243–9
- Pardey J, Moulden M, Redman CWG. A computer system for the numerical analysis of nonstress test. Am J Obstet Gynecol 2002;186:1095–103
- Wheeler T, Murrills A, Shelley T. Measurement of the fetal heart rate during pregnancy by a new electrocardiographic technique. Br J Obstet Gynaecol 1978;85:12–17
- Dawes GS, Visser GHA, Goodman JDS, Redman CWG. Numerical analysis of the human fetal heart rate: the quality of ultrasound records. Am J Obstet Gynecol 1981;141:43–52
- Graatsma EM, Jacod BC, van Egmond LAJ, et al. Fetal electrocardiography: feasibility of long-term fetal heart rate recordings. Br J Obstet Gynaecol 2009;116:334–8
- Theron GB, Thompson ML. A Centile chart for birth weight for an urban population of the Western Cape. S Afr Med J 1995;85:1289–92
- Macones GA, Hankins GDV, Spong CY, et al. The 2008 National Institute of Child Health and Human Development workshop report on electronic fetal monitoring: update on definitions, interpretations and research guidelines. JOGNN 2008;37:510–15
- De Vries JIP, Visser GHA, Mulder EJH, Prechtl HFR. Diurnal and other variations in fetal movement and heart rate patterns at 20–22 weeks. Early Human Develop 1987;15:333–48
- Visser GH, Dawes GS, Redman CW. Numerical analysis of the normal human antenatal fetal heart rate. Br J Obstet Gynaecol 1981;88:792–802
- Swartjes JM, van Geijn HP, Mantel R, Schoemaker HC. Quantitated fetal heart rhythm at 20, 32 and 38 weeks of gestation and dependence on rest-activity patterns. Early Human Develop 1992;28:27–36
- Van Leeuwen P, Lange S, Bettermann H, et al. Fetal heart rate variability and complexity in the course of pregnancy. Early Human Develop 1999;54:259–69
- Mantel R, van Geijn HP, Ververs IAP, Copray FJA. Automated analysis of near-term antepartum fetal heart rate in relation to fetal behavioural states: the Sonicaid System 8000. Am J Obstet Gynecol 1991;165:57–65
- Nijhuis JG, Prechtl HFR, Martin CB, Bots RSGM. Are there behaviour states in the human fetus? Early Human Develop 1982;6:177–95
- Natale R, Nasello C, Turliuk R. The relationship between movements and accelerations in fetal heart rate at twenty-four to thirty-two weeks’ gestation. Am J Obstet Gynecol 1984;148:591–5
- Natale R, Nasello-Paterson C, Turliuk R. Longitudinal measurements of fetal breathing, body movements, heart rate, and heart rate accelerations and decelerations at 24 to 32 weeks of gestation. Am J Obstet Gynecol 1985;151:256–63
- DiPietro JA, Hodgson DM, Costigan KA, et al. Development of fetal movement – fetal heart rate coupling from 20 weeks through term. Early Human Develop 1996;44:139–51
- Khan R, Burgoyne L, O’Donnell M, Dempsey EM. Antenatal management of expectant mother and extreme preterm infant at the limits of viability. Irish Med J 2010;103:266–9