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Week 19:
You're halfway there! The top of your uterus now reaches your belly button and will grow about a centimeter per week. The fetus measures around 6 inches/ 15 centimeters long from crown to rump and weighs about 9 ounces/ 240 grams. She has started to swallow amniotic fluid, and her kidneys continue to make urine. Hair on the scalp is sprouting. Sensory development reaches its peak this week. The nerve cells serving each of the senses - taste, smell, hearing, seeing and touch - are now developing in their specialised areas of the brain. Nerve cell production slows down as existing nerve cells grow larger and make more complex connections. If you're carrying a baby girl, she already has roughly six million eggs in her ovaries. By the time she's born, she'll have about one million.
You may have felt the kicking and somersaulting of your growing baby. At times, you might find that she is so mobile that you can't sleep. The next 10 weeks or so will be your baby's busiest and most active time, until the womb gets too crowded. Two will soon be three and that will mean lots of changes, so have a look at our sex and relationships section.
• Note: Experts say every baby develops differently - even in utero. These fetal development pages are designed to give a general idea of how a fetus grows in the womb.
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