Marathon County, Wausau Wisconsin. Middle of the night UFO approx 25 feet in circumference hovered on the north side of our farmhouse. It was about 40 to 50 feet in the air and silent. It had 3 or 4 different colored lights. I was a young girl and my mom kept asking my dad what that was. Oddly, every one of us had serious reproductive issues not long afterwards. Sightings were documented as well by Marathon County Sheriff Dept following UFO on McIntosh Rd, Wausau toward our farm.