Week 5

Your Baby This Coming Week
Your baby is now about the size of an apple seed. That's about 0.08 to 0.16 inches (2 to 4mm) from crown to rump. It has formed a distinct head with the first stages of eyes and ears. The spinal column and cord are formed. Buds that will grow limbs have also formed. The heart is starting to beat and at this stage its beating may even be detected by sensitive ultrasound equipment, though, it's still very early. The kidneys, liver and nerve cells have also begun to develop. Ten dental buds are growing in the jaws. Blood circulation has begun and primitive red blood cells circulate. The neural tube has closed over along your baby's spine. The optic vesicles, which resemble tiny discs of pigment set in cups along the sides of your baby's head will develop into your baby's eyes. A distinct tail is still present. The body is shaped like the letter "C".

Your Body This Coming Week
By now your pregnancy should have been confirmed. You may be experiencing morning sickness (not necessarily only in the morning). You will have begun to notice changes in your body: you may have gained a few pounds, or you may have even lost weight if you've been suffering from morning sickness. Your uterus is growing, although it is still smaller than a tennis ball and you do not "show". Your metabolism has likely increased to deal with the changes taking place in your body. Some women begin to suffer from heartburn and constipation. You may also be feeling tired and irritable sometimes due to the increase in levels of the hormone progesterone. (This is the same hormone that can make you feel irritable before you get your period).