What people believe
The idea that nausea and vomiting are a "good sign" during early pregnancy is extremely common. Women who do not experience morning sickness sometimes feel anxious that something is wrong. Conversely, women suffering from severe nausea are sometimes told to be grateful for it, which minimises genuine suffering — particularly in cases of hyperemesis gravidarum, a condition that can require hospitalisation.
What the evidence says
There is some statistical association between nausea and vomiting in pregnancy (NVP) and a lower risk of miscarriage. A meta-analysis of 10 studies found that women experiencing NVP had approximately 50% lower odds of pregnancy loss compared to women without symptoms.1 The mechanism may relate to higher levels of human chorionic gonadotropin (hCG), which both sustains early pregnancy and triggers nausea.
However, this association does not mean that the absence of nausea indicates a problem. Approximately 20–30% of pregnancies progress entirely normally without any morning sickness.2 Many healthy pregnancies involve no nausea at all. The statistical association holds at the population level but is not diagnostic for an individual pregnancy.
Furthermore, severe nausea and vomiting (hyperemesis gravidarum) is not a sign of a "more healthy" pregnancy. It is a medical condition affecting 0.3–3% of pregnancies that can lead to dehydration, weight loss, electrolyte imbalances, and in rare cases, serious complications for both mother and baby.3 It requires medical treatment, not reassurance.
What to do instead
If you experience morning sickness, it is a common symptom — nothing more, nothing less. If you do not experience it, that is also normal. If nausea is severe enough to prevent you from keeping fluids down, losing weight, or functioning in daily life, speak with your provider about treatment options. Hyperemesis gravidarum is a treatable condition, not a badge of honour.