Dip in BBT??

Anyone else get a dip in BBT around your fertile window? Is that an indicator of ovulation possibly? Mine went from around 97.5 basically since CD1 to 96.4 for the past two days in a row. Just entered my fertile window on the 10th. Just curious if this is just my body doing whatever or if it could be an indicator of impending ovulation. Thanks for input ladies!