Common Pregnancy Complications Obstetricians Manage and How They’re Treated

Pregnancy is usually healthy, but complications can arise even in low-risk pregnancies. Knowing the warning signs, what tests to expect, and how obstetricians manage common issues helps you seek care promptly and make informed choices. This guide explains major pregnancy complications, how they’re diagnosed and treated, and what you can do now to protect your health and your baby’s—whether you’re pregnant, planning, or supporting someone who is.

How Obstetricians Monitor Pregnancy Health: Risk Assessment, Routine Tests, and Shared Decision-Making

Your obstetric team builds a personalized plan by combining your medical history, current pregnancy findings, and your preferences. Early visits identify risks such as prior preterm birth, high blood pressure, diabetes, autoimmune disease, or multiple gestation. Throughout pregnancy, providers review symptoms, blood pressure, weight, and lab results, and discuss screening and treatment choices using shared decision-making—balancing benefits, risks, and your goals.

Risk assessment tools: prior pregnancy outcomes, chronic conditions, medications, age, BMI, family history, social determinants of health.
Routine monitoring: blood pressure and urine checks, blood tests, screening for infections, fetal growth and movement, mental health screening, and tailored ultrasounds.
Shared decisions: timing of genetic and glucose screening, vaccines, medication changes, trial of labor after cesarean, induction timing, and pain management options.

Red-Flag Symptoms: When to Call Your Provider or Go to Labor & Delivery

Seek urgent care for:

Vaginal bleeding (any amount with pain, or heavy/painless bleeding in later pregnancy)
Severe or persistent abdominal pain, contractions before 37 weeks, or suspected leakage of fluid
Severe headache, vision changes, shortness of breath, chest pain, or swelling of face/hands
Blood pressure ≥140/90 at home, especially with headache, visual changes, or right upper abdominal pain
Fever ≥100.4°F (38°C), burning with urination, or back/flank pain
Marked decrease in fetal movement after 28 weeks
Severe vomiting with inability to keep fluids down, signs of dehydration
Thoughts of self-harm or harming others, confusion, or behavior changes

Understanding Risk Factors You Can and Can’t Change—and What You Can Do Now

Some risks can’t be changed (age, prior pregnancy outcomes, certain medical diagnoses), but many are modifiable.

You can do now: take prenatal vitamins with folic acid and iodine; attend all prenatal visits; track blood pressure at home if advised; follow tailored nutrition and activity plans; avoid smoking, alcohol, and drugs; get recommended vaccines; ask about aspirin 81 mg daily if at high risk for preeclampsia; treat infections promptly; and seek support for stress or intimate partner violence.

What to Expect at Prenatal Visits: Screening, Ultrasounds, Labs, and Fetal Surveillance

First visit: confirmation of pregnancy, dating ultrasound if needed, baseline labs (blood type and Rh, antibody screen, CBC, HIV, hepatitis B/C, syphilis, rubella/varicella immunity), urine culture, and counseling.
First/second trimester: genetic screening options (cell-free DNA from 10 weeks; nuchal translucency ultrasound around 11–13 weeks; or second-trimester serum screening), anatomy ultrasound at 18–22 weeks.
24–28 weeks: gestational diabetes screening, repeat CBC, repeat antibody screen if Rh-negative, Tdap vaccine between 27–36 weeks.
Third trimester: GBS swab at 36–37 weeks; additional growth scans or nonstress tests (NST) if indicated.
Fetal surveillance when needed: NST, biophysical profile (BPP), umbilical artery and other Dopplers, and kick counts at home.

Early Pregnancy Bleeding and Miscarriage: Symptoms, Evaluation (hCG/Ultrasound), Treatment Options, and Emotional Support

Bleeding in early pregnancy is common and not always a miscarriage. Evaluation includes pelvic exam, serial quantitative hCG levels, and transvaginal ultrasound.

Symptoms to report: bleeding, cramping, tissue passage, dizziness, shoulder pain (concern for ectopic).
Treatment options (based on diagnosis and preference):
- Expectant management (watchful waiting)
- Medication (misoprostol, sometimes mifepristone plus misoprostol)
- Uterine aspiration (office or operating room)
Rh-negative patients typically receive Rho(D) immune globulin. Emotional support and follow-up are essential; most people have healthy future pregnancies.

Ectopic Pregnancy and Pregnancy of Unknown Location: Warning Signs, Diagnosis, Methotrexate vs. Surgery, and Future Fertility

An ectopic pregnancy implants outside the uterus (usually in the fallopian tube) and can be life-threatening if it ruptures.

Warning signs: one-sided pelvic pain, shoulder pain, dizziness/fainting, and bleeding.
Diagnosis: serial hCG trends, transvaginal ultrasound; sometimes diagnostic laparoscopy.
Treatment:
- Methotrexate for stable patients with no fetal cardiac activity, smaller mass, and lower hCG; requires follow-up hCG until zero and contraception for a period after.
- Surgery (salpingectomy or salpingostomy) for rupture, contraindications to methotrexate, or higher hCG/large mass.
Future fertility: many conceive successfully; early ultrasound in subsequent pregnancies is recommended.

Severe Nausea and Vomiting (Hyperemesis Gravidarum): Dehydration Signs, Safe Medications, IV Support, and Nutrition Strategies

Dehydration signs: minimal urination, dark urine, dizziness, rapid heartbeat, inability to keep liquids down.
Treatment options:
- Lifestyle: small frequent meals, ginger, vitamin B6 foods, acupressure wristbands.
- Medications: pyridoxine (B6) with doxylamine, antihistamines, metoclopramide, promethazine, ondansetron when needed; add thiamine before IV dextrose to prevent Wernicke encephalopathy.
- Support: IV fluids, electrolyte replacement, acid-reflux therapy; consider enteral nutrition if severe.
Monitor weight, ketones, and electrolytes; rule out other causes (thyroid, molar pregnancy).

Urinary Tract and Kidney Infections: Screening, Safe Antibiotics, Preventing Recurrence, and When Hospital Care Is Needed

Screening: a urine culture early in pregnancy; treat asymptomatic bacteriuria to prevent pyelonephritis.
Symptoms: burning urination, urgency, frequency, suprapubic pain; fever or back/flank pain suggests kidney infection.
Safe antibiotics: cephalexin, amoxicillin-clavulanate, nitrofurantoin (avoid near term in G6PD deficiency), fosfomycin; avoid fluoroquinolones and tetracyclines.
Pyelonephritis needs hospital care for IV antibiotics and monitoring.
Prevention: hydration, voiding after intercourse, treat constipation; consider nightly suppressive antibiotics for recurrent UTIs.

Thyroid Disorders in Pregnancy: Recognizing Symptoms, TSH Targets, Medication Adjustments, and Newborn Considerations

Hypothyroidism: fatigue, cold intolerance, constipation. Treat with levothyroxine; most need a dose increase (~25–30%) when pregnant. Target trimester-specific TSH (often roughly 0.1–4.0 mIU/L, with lab-specific ranges); recheck every 4–6 weeks.
Hyperthyroidism: palpitations, weight loss, tremor. Use propylthiouracil in first trimester, then methimazole; use lowest effective dose. Monitor thyroid function regularly.
Newborn: if maternal thyroid antibodies or antithyroid drugs are used, pediatric team monitors baby’s thyroid function.

Anemia and Iron Deficiency: Fatigue Clues, Lab Diagnosis, Oral vs. IV Iron, Diet Tips, and Follow-Up

Clues: fatigue, shortness of breath, pale skin, restless legs.
Diagnosis: CBC and ferritin (iron deficiency often ferritin <30 ng/mL).
Treatment options:
- Oral iron (e.g., 45–65 mg elemental iron daily or on alternate days with vitamin C; avoid with calcium/coffee).
- IV iron for intolerance, severe anemia, or late pregnancy.
Diet tips: iron-rich foods (red meat, beans, lentils, fortified cereals, leafy greens) plus vitamin C; separate from calcium.
Recheck blood counts and ferritin to confirm response.

Gestational Diabetes: Screening Tests, Glucose Targets, Nutrition Plans, Medications, Birth Planning, and Postpartum Prevention

Screening: at 24–28 weeks (earlier if high risk) with either a 2-step approach (50 g screen, then 100 g OGTT if positive) or 1-step 75 g OGTT.
Targets: fasting <95 mg/dL; 1-hour <140 mg/dL or 2-hour <120 mg/dL.
Management:
- Nutrition and activity plans with a dietitian; home glucose checks.
- Medications: insulin is first-line if targets aren’t met; metformin is commonly used when appropriate; glyburide is less favored.
Fetal monitoring: may include growth ultrasounds and NSTs.
Birth planning: timing depends on control—often by 39 weeks if on medication; earlier if poorly controlled or with complications.
Postpartum: 4–12 week 75 g OGTT; long-term diabetes prevention with lifestyle changes and breastfeeding.

High Blood Pressure, Preeclampsia, and HELLP: Warning Signs, Home BP Monitoring, Labs, Medications, Magnesium, and Timing of Delivery

Definitions:
- Chronic hypertension before 20 weeks or pre-pregnancy.
- Gestational hypertension after 20 weeks without proteinuria.
- Preeclampsia: BP ≥140/90 after 20 weeks plus proteinuria or severe features (severe headache, vision changes, platelets <100k, creatinine rise, liver enzyme elevation, pulmonary edema, severe hypertension ≥160/110).
Management:
- Home BP monitoring; call for readings ≥140/90 and urgently for ≥160/110.
- Medications: labetalol, nifedipine, or methyldopa; avoid ACE inhibitors/ARBs.
- Low-dose aspirin starting by 12–16 weeks for those at high risk.
- Labs for kidney/liver function and platelets; urine protein assessment.
- Magnesium sulfate during labor/postpartum for seizure prevention in preeclampsia with severe features.
Delivery timing:
- Gestational HTN or preeclampsia without severe features at 37 weeks.
- With severe features at 34 weeks or sooner if unstable.
- HELLP syndrome often requires urgent delivery after stabilization.

Placenta Previa and Accreta Spectrum: Painless Bleeding, Ultrasound Diagnosis, Pelvic Rest, Hemorrhage Planning, and Cesarean Timing

Placenta previa: placenta covers or is very near the cervix; classically painless bleeding in the second/third trimester. Diagnosed by ultrasound.
Management: pelvic rest; avoid vaginal exams; plan cesarean if previa persists.
Placenta accreta spectrum (placenta abnormally adherent) risks include prior cesarean and previa; requires delivery at a center with a multidisciplinary team, blood bank readiness, and possible planned cesarean hysterectomy.
Timing: previa cesarean typically around 36–37 weeks; accreta often 34–36 weeks with steroids.

Placental Abruption: Sudden Painful Bleeding, Risk Factors, Emergency Care, and Delivery Decisions

Presents with sudden painful bleeding, uterine tenderness, and contractions; fetal distress may occur.
Risk factors: hypertension, trauma, smoking, cocaine, prior abruption.
Management: urgent evaluation, IV access, labs, continuous fetal monitoring; delivery if severe or fetal/maternal compromise (often cesarean if unstable).

Short Cervix and Cervical Insufficiency: Screening, Progesterone, Cerclage, and Activity Guidance

Screening for those at risk: transvaginal cervical length 16–24 weeks.
Interventions:
- Vaginal progesterone for cervical length <25 mm without prior preterm birth.
- Cerclage if prior spontaneous preterm birth with short cervix, or classic cervical insufficiency.
Activity: individualized; avoid unnecessary pelvic exams; discuss work and travel.

Preterm Labor and PPROM: Contractions or Fluid Leakage, Steroids, Tocolysis, Magnesium for Neuroprotection, and NICU Planning

Preterm labor: regular contractions plus cervical change before 37 weeks. PPROM: membrane rupture before labor.
Management:
- Antenatal corticosteroids (typically 24–34 weeks; may consider up to 36+6 in select cases).
- Tocolysis short-term (e.g., nifedipine; indomethacin before 32 weeks) to complete steroids.
- Magnesium sulfate for fetal neuroprotection (<32 weeks).
- Antibiotics for PPROM to prolong latency and for GBS prophylaxis.
- NICU consultation and delivery planning based on gestational age and clinical status.

Fetal Growth Restriction: Causes, Dopplers and NST/BPP Monitoring, Nutrition, and Optimal Delivery Timing

Defined as estimated fetal weight <10th percentile or evidence of placental insufficiency.
Causes: placental dysfunction, hypertension, smoking, infections, genetic factors.
Monitoring: serial growth ultrasounds, umbilical artery and other Dopplers, NST/BPP.
Management: optimize maternal health, nutrition, and treat underlying conditions; delivery timing depends on severity and testing results, often 37–39 weeks, earlier if Dopplers are abnormal.

Amniotic Fluid Concerns (Oligohydramnios/Polyhydramnios): Causes, Monitoring, Interventions, and Birth Planning

Oligohydramnios: low fluid (MVP <2 cm or AFI 1 pad/hour or large clots
- Severe headache, vision changes, shortness of breath, chest pain
- Fever, foul-smelling discharge, worsening incision or perineal pain
- Leg swelling/pain, mood changes, or thoughts of self-harm
Follow-up: early blood pressure check if hypertensive disorders; 4–12 week glucose test after GDM; mood screening; contraception planning; lactation support.
Supports: pelvic floor therapy, social services, home BP cuff, community resources.

Partnering With Your Care Team: Questions to Ask, Tracking Symptoms at Home, and Making a Personalized Plan

Questions: What are my risks? Which tests are recommended and why? What are alternatives? What should prompt a call? What’s our delivery plan and backup plans?
Track at home: blood pressure, glucose (if applicable), weight gain, fetal movements, symptoms, and medication adherence.
Personalized plan: involves your preferences, cultural considerations, and logistics (work, childcare, transportation), updated at each visit.

FAQ

Bold italics question style follows.
Do I have to repeat all genetic tests if I switch providers? Usually no—bring records; some tests are time-sensitive, and your new provider may recommend additional or updated screening based on timing and results.
When should I buy a home blood pressure cuff? If you have or are at risk for hypertension or preeclampsia, get a validated upper-arm cuff early in pregnancy and learn how to use it; share readings with your provider.
Is metformin safe for gestational diabetes? Many use it when insulin isn’t feasible, but insulin remains first-line. Metformin crosses the placenta; discuss pros/cons and monitoring with your provider.
Can I fly during pregnancy if I have complications? It depends on the condition and gestational age. Many complications (e.g., placenta previa with bleeding risk, uncontrolled hypertension) make flying unsafe. Get individualized clearance.
Do kick counts replace prenatal testing like NSTs? No. Kick counts help you recognize changes; formal testing assesses fetal well-being when there are risks.
Will a prior cesarean prevent vaginal birth? Not always. Many with one prior low-transverse cesarean are candidates for VBAC; decision depends on your history and current pregnancy.
Is it safe to get vaccinated while pregnant? Yes for recommended vaccines like influenza, Tdap, and COVID-19; they protect you and the newborn. Avoid live vaccines during pregnancy.

More Information

ACOG Patient Education: https://www.acog.org/womens-health
CDC Pregnancy: https://www.cdc.gov/pregnancy/index.html
Mayo Clinic Pregnancy Health: https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week
MedlinePlus Pregnancy: https://medlineplus.gov/pregnancy.html
March of Dimes Complications: https://www.marchofdimes.org/find-support/topics/pregnancy/pregnancy-complications
NIH/Healthline Overviews: https://www.healthline.com/health/pregnancy

If this guide helped you, share it with someone expecting a baby. Bring your questions to your next prenatal visit and use this article to plan discussions with your care team. For more pregnancy health resources and local providers, explore related content on Weence.com.