Time runs so fast... I'm on my 4th month. My tummy gets a little bigger, I think I gain some weight.. My ordinary cloths can't fit me and I think I have to try some maternity dress when out. I am more sleepy and take a nap every time I feel I need to. I am overwhelmed with the people around me for pampering me much! :D According to my research, My little baby's size is 5in and weigh about 100 grams. The circulatory system and urinary tract are in full working working order, and and inhaling and exhaling through the lungs.