This week your baby has an amazing growth spurt. At the beginning of this week, your baby is approximately 4 to 5 mm and by the end of the week it has more than doubled to 11 to 13 mm! Your baby weights approximately 0.03 ounces. Most women are ready for the world to know they are pregnant. Even though you have not changed very much yet, it will come soon! You might have gained a small amount of weight by now, but it should only be a couple of pounds at this time. It is not unusual to lose a few pounds or remain the same though. Internally, cervical mucus is thickening and will form a plug in the cervical canal. The plug seals your cervix throughout the pregnancy and it will be expelled prior to delivery when your cervix begins to dilate. Your baby's leg and arm buds are longer now and they have divided into segments where the hands and feet will be. The hands and feet also have an area where the fingers and toes will begin to form. At this point of your pregnancy, the heart is bulging from the body and it has divided into right and left chambers. The brain's hemispheres are continuing to grow and the air passages into the lungs are visible. Your baby's eyes are beginning to get pigment. The nose is developing and the beginning of the face can be seen. The baby's abdomen is developing quickly and the appendix and pancreas are already present. Your baby's digestive tract is beginning to form and the hindgut is present. The shape of the talk can still be seen, but it will fade in 3 or 4 weeks.