Routine prenatal care
Routine prenatal care is the scheduled, gestational-age-anchored protocol of visits, counseling, and screening tests that confirms dating, stratifies risk, and detects treatable complications before they harm mother or fetus. The visit interval (every 4 weeks to 28 weeks, every 2 weeks to 36 weeks, weekly thereafter) carries a fixed sequence of labs, ultrasounds, and prophylaxis, so any abnormal result at a given gestational age has its own defined next step rather than an open-ended workup.
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What this article covers
- Overview
Routine prenatal care is the structured protocol of scheduled visits, counseling, and screening that follows a confirmed pregnancy from the first visit through delivery, to date the pregnancy…
- Epidemiology
Conception occurs in roughly 30% of couples in the first cycle of unprotected intercourse, rising to about 75% by 6 months and 90% by 1 year, framing how early a missed period should prompt a pregnancy test and care entry.
- Risk factors
Chronic hypertension, pregestational diabetes, prior preeclampsia, multifetal gestation, chronic kidney disease, or antiphospholipid syndrome qualify a patient for daily low-dose aspirin prophylaxis and closer surveillance.
- Pathophysiology
Cardiac output rises roughly 40%, heart rate roughly 10 bpm, and blood pressure gradually falls in the second trimester, while renal plasma flow and glomerular filtration rise about 50%; these shift…
- Clinical features
The first visit occurs as soon as pregnancy is confirmed, ideally by 10 weeks, and establishes the due date plus the baseline panel and dating ultrasound listed in Management.
- Differential diagnosis
Abnormal 1-hour glucose challenge (=140 mg/dL) at 24-28 weeks: suggests gestational diabetes, but a single elevated value is not diagnostic; discriminate with the 3-hour 100-g glucose tolerance test…
- Diagnosis
There is no criteria set for "routine prenatal care" itself; the sequence opens by confirming pregnancy and fixing the estimated due date, which anchors every later screening window (10-, 15-, 18-20-, 24-28-, 28-, and 36-week tests).
- Management
At the first visit (ideally by 10 weeks): obtain the routine panel (CBC, HIV, RPR, hepatitis B/C, blood type and antibody screen, urine culture, gonorrhea/chlamydia/trichomonas testing…
- Complications
Undiagnosed gestational diabetes raises macrosomia and shoulder dystocia risk.
- Prognosis
Consistent engagement with the schedule allows most complications (gestational diabetes, preeclampsia, group B streptococcus colonization, alloimmunization, growth restriction) to be identified while still modifiable.
- Prevention
Begin folic acid 0.4 mg PO once daily at least 1 month before conception, continued through pregnancy (4 mg PO once daily preconception for a prior neural-tube-defect-affected pregnancy or folate-antagonist medication use).
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