There is no direct relationship between hyperemesis gravidarum and preterm labor, and there is no medical term for hyperemesis gravidarum.
The so-called hyperemesis gravidarum is usually caused by the development of the uterus in a lower position or the relaxation of the abdominal muscles of the pregnant woman, which leads to the phenomenon of the lowering of the position of the pregnancy.
Preterm labor can be caused by prolonged depression, infection, gestational hypertension, premature rupture of membranes, gestational diabetes, and twin pregnancy, etc. You should pay attention to regular checkups, and seek medical attention if any abnormality occurs.
Pregnancy is not related to preterm labor, during pregnancy, you should pay attention to regular maternity checkups, if there is any abnormality, you should consult a doctor in a timely manner.