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Fetal mouth movements during behavioural states 1F and 2F.
van Woerden EE, van Geijn HP, Caron FJ, van der Valk AW, Swartjes JM, Arts NF. van Woerden EE, et al. Among authors: van der valk aw. Eur J Obstet Gynecol Reprod Biol. 1988 Oct;29(2):97-105. doi: 10.1016/0028-2243(88)90135-9. Eur J Obstet Gynecol Reprod Biol. 1988. PMID: 3056756