18 weeks!What your baby's up to: info taken from pregnancyandbaby.com
Your baby continues to grow rapidly. His bones are continuing the ossification (hardening) process and the pads of the fingers and toes are formed. He even has his own set of fingerprints developing as well. Your baby is approximately 5.5 inches and weighs about 200 grams (7.5 ounces).
Your baby can kick, swallow, and sleep. He also is developing his stomach, intestine and colon and the intestines collect meconium (the initial stool a baby will pass after birth). If the baby is a boy, the prostate will begin to develop this week as well. The skin is still a bit pink and transparent and his ears still stick out from his head. The four-chambered heart begins to build up muscle cells and is pumping between 25 and 30 quarts of blood per day.