Szeto, H H (1991) Morphine-induced activation of fetal EEG is mediated via central muscarinic pathways. Am J Physiol 260:R509-17
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Szeto, H H; Hinman, D J (1990) Central muscarinic modulation of fetal blood pressure and heart rate. J Dev Physiol 13:17-23
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Szeto, H H; Zhu, Y S; Cai, L Q (1990) Central opioid modulation of fetal cardiovascular function: role of mu- and delta-receptors. Am J Physiol 258:R1453-8
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McNerney, M E; Szeto, H H (1990) Automated identification and quantitation of four patterns of electrocortical activity in the near-term fetal lamb. Pediatr Res 28:106-10
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Zhu, Y S; Szeto, H H (1989) Morphine-induced tachycardia in fetal lambs: a bell-shaped dose-response curve. J Pharmacol Exp Ther 249:78-82
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Hinman, D J; Szeto, H H (1988) Cholinergic influences on sleep-wake patterns and breathing movements in the fetus. J Pharmacol Exp Ther 247:372-8
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Szeto, H H; Zhu, Y S; Umans, J G et al. (1988) Dual action of morphine on fetal breathing movements. J Pharmacol Exp Ther 245:537-42
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Szeto, H H; Zhu, Y S; Amione, J et al. (1988) Prenatal morphine exposure and sleep-wake disturbances in the fetus. Sleep 11:121-30
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Zhu, Y S; Szeto, H H (1987) Cyclic variation in fetal heart rate and sympathetic activity. Am J Obstet Gynecol 156:1001-5
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Umans, J G; Umans, H R; Szeto, H H (1986) Effects of thyrotropin-releasing hormone in the fetal lamb. Am J Obstet Gynecol 155:1266-71
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