How I am doing at 4 months...and latest developments!

At 4 1/2 inches long (head to bottom) and 3 1/2 ounces, I am about the size of an avocado. In the next three weeks, I will go through a tremendous growth spurt, though, doubling my weight and adding inches to my length. My lower limbs are much more developed now. My head is more erect than it has been, and my eyes have moved toward the front of my head. My ears are close to their final position...from what I hear. :) Some of my more advanced body systems are working, including circulatory system and urinary tract. My heart is now pumping about 25 quarts of blood each day, circulating my total blood volume through my body many times. (By the end of 9 months, this will increase to about 190 quarts.) The patterning of my scalp has also begun, though my hair isn't recognizable yet. Although closed, my eyes are moving (slowly), and I am even started growing toenails.