Final answer:
Contributing factors to hyperemesis gravidarum include low levels of hCG, multiple pregnancies, and obesity.
Step-by-step explanation:
Hyperemesis gravidarum, a severe form of morning sickness during pregnancy, can be caused by several contributing factors. These factors include:
- Low levels of human chorionic gonadotropin (hCG): High levels of hCG are correlated with more severe nausea and vomiting in pregnancy.
- Multiple pregnancies: Women carrying multiples are more likely to experience hyperemesis gravidarum due to higher hormone levels.
- Obesity: Obese women have a higher risk of developing hyperemesis gravidarum.