I am 6" (14.2 cm) long from crown to rump and I weigh about 7 oz (190 g). My chest moves up and down to mimic breathing but I'm not taking in air, only amniotic fluid. I'm busy flexing my arms and legs — movements that Mummy is feeling more and more. Myelin (a protective covering) is beginning to form around my nerves, a process that will continue for a year after I'm born. If I'm a girl, my uterus and fallopian tubes are formed and in place. If I'm a boy, my genitals are noticeable on an ultrasound scan.
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