At 30 weeks your baby is approximately 15.7 inches from head to toe, and weighs almost 3 pounds(about the size of a large cabbage or a bunch of broccoli).
A pint and a half of amniotic fluid surrounds your baby, but that volume will shrink as it gets bigger and takes up more room in your uterus. Your baby’s eyesight continues to develop, though it's not very good; even after it's born, it'll keep it’s eyes closed for a good part of the day. When they are opened, it'll respond to changes in light but will have 20/400 vision – which means baby can only make out objects a few inches from it face. (Normal adult vision is 20/20.) The surface of your baby’s brain begins to wrinkle (the wrinkles are called convolutions)so that it can hold more brain cells. Your baby’s hands are now fully formed and its fingernails are growing. In ultrasounds, you may catch baby grabbing its foot. Now that baby’s brain and new fat cells are regulating its body temperature, the lanugo — that soft, downy hair covering your little bean's body — is beginning to disappear (no need for that furry coat anymore). But you may see a few leftover strands of fur on your newborn's back and shoulders when its born. Your baby's bone marrow has completely taken over production of red blood cells (before, tissue groups and then the spleen took care of producing the blood cells). This is an important step for your baby because it means it'll be better able to thrive on its own once baby's born. From this point on, your baby will gain about a half pound each week. All that baby weight is for more than filling out his chubby cheeks. Now that all of his major body systems are in place and functioning, baby needs padding to protect and insulate its organs. The built-up fat tissue will also help baby regulate Its body temperature after birth and provide the energy it needs. You might notice your belly getting pretty hard and tight at times. At this point in your pregnancy Braxton Hicks contractions are pretty common. These are your body’s way of gearing up for labor. Braxton Hicks tend to happen after exercise or sex, or when you’re tired or dehydrated. If you get them, sit down or lie on your side, relax, and drink water. If the contractions don’t stop, or if you have four or more in an hour, call your doctor. It could actually be preterm labor.
Note: Every baby develops a little differently — even in the womb. This information is to give you a general idea of your baby's size.
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