How our baby's growing!!! 12 weeks

Your baby's crown-to-rump length is almost 2.5 inches and she now weighs between 8 and 14 grams! In just three weeks, your baby's size has more than doubled and begins to look a lot more human. Even though you won't be able to feel your baby moving at this time, you can stimulate him and he will squint, open his mouth and move his fingers or toes.

         By the end of this week, your uterus is too large to remain completely in your pelvis. You might be able to feel your uterus above your pubic bone. The uterus will continue to grow throughout your pregnancy and will return to its usual size within a few weeks after delivery. Before pregnancy, the uterus is almost solid and holds less than 0.3 ounces. During pregnancy, your uterus will become a thin-walled, muscular container that will hold the fetus, amniotic fluid and placenta. Before pregnancy, the uterus weighs approximately 2.5 ounces and when your baby is born, it will weigh almost 40 ounces!

         Because most of the structures are already formed at this point, few will be formed after this time. The structures will continue to grow and develop throughout the remainder of your pregnancy. Your baby's skeletal system now has centers if bone formation in most of the bones. The digestive system is capable of making contractions that push food through the bowels and it is also able to absorb sugar. The pituitary gland beginning to make hormones. You will probably be able to hear your baby's heartbeat with a Doppler at this time

            Your uterus has grown to the point where your healthcare provider can now feel the top of it (the fundus) low in your abdomen, just above your pubic bone. You may already be into maternity clothes, especially if this isn't your first pregnancy. If you're still fairly small and not yet ready for maternity clothes, you've no doubt noticed that your waist is thickening and that you're more comfortable in loose, less restrictive clothing.
            You may begin to feel heartburn (also called acid indigestion), a burning sensation that often extends from the bottom of your breastbone to your lower throat. Many women get heartburn for the first time during pregnancy, and those who've previously had bouts of heartburn may find that it gets worse. During pregnancy, the placenta produces a lot of the hormone progesterone, which relaxes the valve that separates the esophagus from the stomach. Particularly when you're lying down, gastric acid can seep back up the pipe, which causes the uncomfortable burning sensation. For many women the problem doesn't begin (or get worse) until later in pregnancy, when your growing uterus starts to push up on your stomach. The discomfort may range from mildly annoying to intense and distracting.