Characteristics of the Unborn Child
8 – 10 Weeks Post-LMP
6 – 8 Weeks Post-Conception
Brainwaves have been measured and recorded before 8 ½ weeks. By 8 ½ weeks, the bones of the jaw and collarbone begin to harden.
By 9 weeks, the hands move, the neck turns, and hiccups begin. Genitals begin to develop.
The heart is nearly fully formed and the heart rate peaks at about 170 beats per minute.
By 10 weeks kidneys begin to produce and release urine, and intermittent breathing motions begin.
All fingers and toes are free and fully formed and several hundred muscles are present. The hands and feet move frequently and show the first signs of right- or left-handedness.
Experts estimate the 10-week embryo possesses approximately 90% of the 4,500 body parts found in adults.
The 10-week embryo weighs about 1/10th of an ounce and measures slightly less than 1 ¼ inches.