When to go to the ER while pregnant

By trimester

Weeks 1–13

1st trimester

Heavy bleeding with severe one-sided pain can point to an ectopic pregnancy this early and needs same-day evaluation, unlike routine light spotting.

Weeks 14–27

2nd trimester

This is when preterm labor signs become relevant to know before 37 weeks: six or more contractions an hour, pelvic pressure, low dull back ache, or a change in discharge, along with any fluid leak that could mean your water broke.

Weeks 28–birth

3rd trimester

Preeclampsia and HELLP syndrome risk is highest now. A severe headache with vision changes, upper right abdominal pain, or new swelling paired with a headache are same-day reasons to get checked, and this is also when a clear drop in fetal movement matters most.

What does the evidence show for pregnancy symptoms that mean you should go to the ER?

• Preterm labor warning signs include contractions every 10 minutes or more often, a change in vaginal discharge, fluid leakage or bleeding, pelvic pressure, low dull back pain, and menstrual-like cramps, and six or more contractions in an hour is considered abnormal and worth same-day evaluation. 1
• The count-to-10 method for tracking fetal movement calls for contacting a healthcare provider if fewer than 10 movements are felt within 2 hours, and any noticeable, ongoing decrease in movement should prompt clinical evaluation. 2
• Eclampsia warning signs that demand immediate medical attention include seizures, severe headache, vision disturbances including temporary blindness, upper right abdominal pain, nausea and vomiting, and reduced urination, and HELLP syndrome can occur even without high blood pressure or protein in the urine, making it easy to miss. 3
• Pyelonephritis (a kidney infection) in pregnancy presents with flank pain, a fever of at least 38.0 degrees Celsius, and chills, and is a leading cause of severe maternal infection, including septic shock, so it requires prompt hospitalization rather than home management. 4
• Any vaginal fluid leakage, whether a continuous gush or a lighter intermittent trickle, warrants prompt evaluation for possible rupture of membranes, and fever, a fast fetal heart rate, uterine tenderness, or foul-smelling discharge are signs of infection that need immediate attention, as does any vaginal bleeding, which can signal placental abruption. 5

When should I call my provider about pregnancy symptoms that mean you should go to the ER?

Go in the same day, or call 911, for heavy vaginal bleeding, fluid leaking or gushing before 37 weeks, six or more contractions an hour, a severe headache with vision changes or upper right abdominal pain, a fever with flank or back pain, or a clear drop in fetal movement after 28 weeks. Any of these can signal preterm labor, ruptured membranes, preeclampsia or HELLP syndrome, a kidney infection, or fetal distress, all of which need prompt evaluation rather than a wait-and-see approach. Chest pain, trouble breathing, or a seizure warrants calling 911 directly instead of driving yourself in. When in doubt, call your obstetric team the same day. Early input almost always beats waiting, and the on-call line exists exactly for this.