Morning Sickness

Frequently Asked Questions

• When does morning sickness start?

  Morning sickness usually starts around the sixth week of pregnancy, counted from the first day of your last menstrual period. It peaks at weeks 9 to 10 and affects about 80 percent of pregnant people — and around half of those will also vomit. Some people notice mild nausea even before the sixth week, while others may not experience any symptoms at all.

• When does morning sickness end?

  For most pregnant people, morning sickness improves significantly by the end of the first trimester — around weeks 12 to 14. A smaller number of people continue to experience nausea into the second trimester, and in rare cases symptoms can persist throughout the entire pregnancy.

• What does morning sickness feel like?

  Morning sickness is most commonly described as a persistent or wave-like feeling of nausea, similar to the queasiness you might feel before a bout of stomach flu or when travelling. It can be accompanied by vomiting, heightened sensitivity to smells or tastes, and a general feeling of being unwell. Despite its name, it can occur at any time of day or night.

• How long does morning sickness last?

  Most people find that morning sickness lasts from around week 6 through to the end of the first trimester at week 12 or 14 — roughly six to eight weeks in total. For some, it resolves sooner; for others it lingers into the second trimester. In rare cases of hyperemesis gravidarum, severe nausea and vomiting can last the full nine months and require medical treatment.

• What causes morning sickness?

  The exact cause isn’t fully understood, but morning sickness is strongly linked to the rapid rise in pregnancy hormones such as human chorionic gonadotropin (hCG) and estrogen. Other contributing factors may include changes to the digestive tract, iron in prenatal vitamins, and a heightened sense of smell. People who are prone to motion sickness, migraines, or nausea from oral contraceptives may be more susceptible.

• What helps with morning sickness?

  Eating small, frequent meals of plain foods such as crackers or toast, staying well hydrated with small sips of water or ginger ale, and avoiding strong smells or fatty and acidic foods can help reduce symptoms. Vitamin B6 (pyridoxine) and ginger supplements are commonly recommended first-line options. If dietary changes aren’t enough, a Rexall Pharmacist can assess your symptoms and recommend or prescribe additional treatments.

• How early does morning sickness start?

  Some pregnant people notice a mild feeling of nausea as early as four to five weeks of pregnancy, shortly after a missed period. However, for most people symptoms become noticeable around week 6. If you suspect you are pregnant and are already feeling nauseous, a home pregnancy test or visit to a healthcare provider can confirm your status.

• Is nausea during pregnancy a sign of a girl?

  Some studies have found a modest association between severe nausea and vomiting in pregnancy and carrying a female fetus, possibly related to higher levels of hCG. However, this is not a reliable predictor of baby’s sex — many people carrying girls have no morning sickness at all, and many carrying boys experience significant nausea. An ultrasound remains the only reliable way to determine sex during pregnancy.

• Does the doxylamine-pyridoxine combination (Diclectin) work for morning sickness?

  Yes — doxylamine-pyridoxine (brand name Diclectin) is the only prescription medication approved by Health Canada specifically for nausea and vomiting of pregnancy, and clinical evidence supports its effectiveness. It combines an antihistamine (doxylamine) with vitamin B6 (pyridoxine) and is generally considered safe for use during pregnancy. It works best when taken consistently as directed rather than only when symptoms are at their worst.

• Can a Rexall Pharmacist prescribe for morning sickness?

  Yes — in most provinces, a Rexall Pharmacist can assess your symptoms, recommend appropriate lifestyle changes, and write prescription treatment to manage morning sickness symptoms, if appropriate. They can also refer you to a physician if your symptoms are severe or require further investigation. Book Consultation at your nearest Rexall to get started.