After 30 weeks of pregnancy, the baby forms a well-established diaphragm in the middle due to the further development of the thoracic and abdominal cavities. During the development of the diaphragm, the contraction of the diaphragm causes the baby to hiccup. For a pregnant woman, her baby’s hiccups in her belly are sometimes perceived as a kind of fetal movement, but there should be a clear difference between the baby’s hiccups and fetal movement. Fetal movements are continuous and do not have a cyclical pattern, while hiccups are particularly regular fetal beats of the baby, with a pattern of 1-2 per second and an overall hiccup time of about 3-5 minutes, when you will notice that the baby’s hiccups suddenly stop, but the fetal movements are still continuously present. So, after 30 weeks, if you experience your baby’s hiccups pregnant women do not need to be anxious, it is completely normal and is a change in the contraction and development of the baby’s diaphragm.