Track when morning sickness typically starts, peaks, and resolves. Enter your LMP to see your personalized nausea timeline.
Morning sickness — medically known as nausea and vomiting of pregnancy (NVP) — affects up to 80% of pregnant women. Understanding the typical timeline can provide reassurance and help you plan around the worst symptoms. This calculator maps your personal morning sickness timeline based on your LMP date.
For most women, nausea begins around week 6, peaks between weeks 8 and 11, and gradually resolves by week 12-14. However, about 10-20% of women experience symptoms beyond the first trimester, and approximately 1-3% develop hyperemesis gravidarum, a severe form that may require medical treatment.
This tool provides estimated dates for onset, peak, and resolution based on published research, giving you a visual timeline of what to expect and when relief is likely to come. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation. By automating the calculation, you save time and reduce the risk of costly errors in your planning and decision-making process.
Knowing when symptoms are likely to peak helps you prepare — whether that means adjusting work schedules, stocking up on bland foods, or scheduling important events outside the peak window. It also provides the reassurance that the worst symptoms are temporary and have a known endpoint for most women. Having a precise figure at your fingertips empowers better planning and more confident decisions.
Onset ≈ LMP + 6 weeks (42 days) Peak Start ≈ LMP + 8 weeks (56 days) Peak End ≈ LMP + 11 weeks (77 days) Resolution ≈ LMP + 12-14 weeks (84-98 days)
Result: Peak: Jan 26 – Feb 16, 2026
With an LMP of December 1, 2025, morning sickness is expected to begin around January 12 (week 6), peak from January 26 to February 16 (weeks 8-11), and resolve around February 23 to March 9 (weeks 12-14). The total symptomatic window is approximately 6-8 weeks.
hCG (human chorionic gonadotropin) levels double every 48 hours in early pregnancy, peaking around weeks 8-11. This rise correlates closely with the peak of morning sickness symptoms. As hCG levels plateau and then decline in the second trimester, nausea typically improves.
During onset (weeks 6-8): Start with dietary modifications — small, frequent, bland meals. During peak (weeks 8-11): Consider vitamin B6 and doxylamine if diet alone is insufficient. During resolution (weeks 12-14): Gradually reintroduce a wider variety of foods as tolerance improves.
Contact your provider if you cannot keep down any food or fluids for 24 hours, lose more than 5% of your body weight, have dark urine or dizziness, or develop fever. These may indicate hyperemesis gravidarum, which is treatable but requires clinical intervention.
The exact cause is unclear, but rising hCG and estrogen levels are believed to play a major role. These hormones peak around weeks 8-11, which coincides with the worst symptoms.
Studies suggest that women with morning sickness have a lower risk of miscarriage. However, the absence of nausea does not mean anything is wrong — up to 20-30% of women have healthy pregnancies without morning sickness.
Hyperemesis gravidarum (HG) is severe, persistent nausea and vomiting that leads to dehydration, weight loss (>5% of body weight), and electrolyte imbalances. It affects 1-3% of pregnancies and may require IV fluids and medication.
For about 10-20% of women, nausea persists past the first trimester. In rare cases, it lasts the entire pregnancy. If symptoms persist past 14 weeks, discuss treatment options with your provider.
Yes. Vitamin B6 (pyridoxine) is first-line therapy. Doxylamine (Unisom) combined with B6 is FDA-approved for pregnancy nausea. Ondansetron (Zofran) may be prescribed for severe cases. Always consult your provider before starting any medication.
Mild to moderate nausea does not harm the baby. Even if you struggle to eat, the baby draws nutrients from your body's reserves in early pregnancy. Severe dehydration from HG can affect fetal growth and requires treatment.