50%-90% of pregnant women experience symptoms of ‘morning sickness’ in the early months of pregnancy. These symptoms can range from mild intolerance to certain odors or food, to more significant, daily nausea and vomiting (N/V). Studies suggest that up to 25% of pregnant women experience nausea, 50% experience both nausea and vomiting, leaving only 25% of pregnant women unaffected. In those affected, the symptoms usually manifest by the 9th week of pregnancy.
Much is written and discussed about home/medical remedies for morning sickness, but much less is written/discussed about the (possible) causes for nausea and vomiting in pregnancy (NVP). Though the cause of NVP has not been proven, it has been postulated that NVP is an innate mechanism, presenting as a ‘protection’ for the developing fetus (an inherent ‘aversion’ to substances that could be harmful to the fetus.) Leading medical theories consider the adverse reaction of the ‘hormones of pregnancy’ as potentially causative (in the absence of other intestinal or medical problems that could present with N/V.)