All 7 of my kids had hiccups in utero. Its a normal response to an immature nervous system. None of my kids have had reflux.
I dont think there is a correlation at all.
Katie, mom to Olivia (97), Veda (98), Franky (2004), Wendy (2005), JoHannah (2007), Thea (2009) and Sunny (2011)