At 26 weeks your baby's veins are visible through your baby's skin, although it is quickly changing from transparent to opaque.
Your baby can hear you and those around you. Although we assume that the uterus is a quiet place, the baby has been surrounded by noise for a long time. Things like your heart beat, digestion, and other body functions are heard by the baby as well as external noises. Now you may feel the baby jump at a sudden noise. My daughter would always jump when I clicked the bathtub lever. It became a game!
The uterus also allows some light to be seen. So your baby is aware of lightness and darkness.
S/he weighs 1 pound 12 ounces (794 grams) and measures 32.5 cms or 12.8 inches total length.
Photo © A.D.A.M. in Fetal Development