A 28-year-old primigravida presents at 14 weeks of gestation for her first antenatal visit. She is asymptomatic with a blood pressure of 110/70 mmHg. On examination, the uterus is palpable just above the symphysis pubis. She has not received any antenatal investigations yet. According to the WHO/NRHM guidelines for antenatal care in India, what is the most appropriate immediate next step?

Explanation

## Antenatal Care Package — First Trimester Visit Protocol ### Standard Approach at First ANC Visit **Key Point:** The first antenatal visit (ideally before 12 weeks, but acceptable up to 16 weeks) is the most critical for baseline assessment and risk stratification. The correct sequence is: **history → examination → baseline investigations → counselling → supplementation**. ### Baseline Investigations at First Visit According to NRHM/WHO guidelines for antenatal care in India, the following investigations are **mandatory** at the first visit: | Investigation | Purpose | |---|---| | Blood group & Rh typing | Identify Rh-negative women for anti-D prophylaxis | | Haemoglobin estimation | Screen for anaemia; baseline for monitoring | | Blood glucose (random/fasting) | Screen for gestational diabetes risk | | Infectious disease serology (HIV, RPR, HBsAg, HCV) | Identify infections requiring intervention | | Urine routine & culture | Detect asymptomatic bacteriuria, proteinuria | | Blood pressure | Establish baseline for hypertension screening | **High-Yield:** These baseline investigations must be done **before** any other intervention (supplementation, imaging) because they determine risk stratification and guide subsequent management. ### Why This Patient Needs Baseline Labs First 1. She is asymptomatic and normotensive — no clinical emergency. 2. Baseline labs are **prerequisite** for identifying: - Rh status (if negative, anti-D needed at 28 weeks and delivery) - Anaemia (affects oxygen-carrying capacity in pregnancy) - Glucose intolerance (early detection improves outcomes) - Infections (HIV, syphilis, hepatitis — require counselling and treatment) 3. These results guide all subsequent ANC decisions. ### Timing of Ultrasound **Clinical Pearl:** While ultrasound is part of comprehensive ANC, it is **not** the immediate next step at the first visit. Ultrasound is typically done: - At 11–14 weeks (NT scan, dating confirmation) — can be deferred if dating is certain by LMP. - At 18–20 weeks (anatomy scan) — second trimester. - At 28 weeks (growth assessment) — third trimester. In this case, the patient is at 14 weeks with a uterus palpable just above the symphysis pubis, which is consistent with dating. Ultrasound can follow after baseline labs. ### Iron & Folic Acid Supplementation is **indicated** but only **after** haemoglobin is known. If Hb < 11 g/dL, iron supplementation is essential; if Hb ≥ 11 g/dL, folic acid alone may suffice. This is why labs must precede supplementation. **Mnemonic:** **BITCH** (for baseline investigations at first ANC visit): - **B**lood group & Rh - **I**nfectious disease serology - **T**esting for glucose - **C**omplete blood count (Hb) - **H**ealth history & vital signs ### Why This Is "Best Next Step" The patient is: - Low-risk (normotensive, asymptomatic, appropriate uterine size). - At a routine first visit (no emergency). - Lacking baseline data (no labs done yet). The **immediate next step** is to obtain baseline investigations, which are the foundation of all subsequent ANC decisions.