Late Booking at 28 Weeks With a History of Pre-eclampsia
A 31-year-old woman, G3P2, moved to Kuwait six weeks ago and books at the community maternity clinic at 28 weeks and 2 days by her last menstrual period; she has no early ultrasound. Her first pregnancy ended at 34 weeks with pre-eclampsia and a 1.9 kg baby; her second was an uncomplicated term vaginal birth. Current BMI is 33. She takes no regular medicines and has no allergies. Blood pressure today is 132/86 mmHg in both arms, urine dipstick shows trace protein, and fundal height is 26 cm. She feels well, has no headache or visual symptoms, and reports good fetal movements. She asks whether she should take 'baby aspirin' because a friend told her it prevents high blood pressure. The clinic has access to a laboratory, ultrasound, and a high-risk obstetric clinic, but the next appointment is in four weeks. The midwife must decide what to do today rather than simply reassure her.
1. Using the history and today's observations, stratify this woman's risk of pre-eclampsia and decide whether aspirin should be started now. Justify the dose, timing, and what else must accompany it.
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Risk stratification: a previous pregnancy complicated by pre-eclampsia requiring delivery at 34 weeks is a high-risk factor. BMI 33 is an additional moderate risk factor, so she qualifies for aspirin prophylaxis. The ideal window is before 16 weeks, when placentation is incomplete; at 28+2 the benefit is smaller, but it is not zero, and she has no contraindication such as active peptic ulcer, aspirin allergy, or a bleeding disorder. Start aspirin 75–150 mg once daily at night now rather than waiting four weeks. Explain that it reduces, but does not eliminate, the risk of pre-eclampsia and does not treat the current blood pressure. Do not diagnose pre-eclampsia today: BP 132/86 is below the 140/90 threshold and trace protein is non-specific. Arrange a same-day urine protein:creatinine ratio, FBC, renal and liver function, and a growth scan because fundal height is 26 cm at 28 weeks. Refer to the high-risk clinic and bring the review forward to 1–2 weeks. Document the shared decision and give warning signs.
2. What baseline investigations and surveillance plan would you arrange today, and how would you communicate the four-week appointment gap?
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Today: repeat BP after rest, urine protein:creatinine ratio, bloods including FBC, urea and creatinine, liver enzymes, and urate, plus ultrasound for growth, liquor volume, and placental localisation. Uterine artery Doppler may be arranged by the high-risk clinic but is not a diagnostic test. Because the next routine appointment is four weeks away, she needs an earlier review within 1–2 weeks and a clear plan for BP monitoring, for example home BP or community clinic readings twice weekly with a written threshold for calling. Provide danger-sign education: headache, visual disturbance, epigastric pain, vomiting, reduced fetal movements, vaginal bleeding, or fluid loss. Discuss delivery planning only in broad terms at this stage. The four-week gap is unsafe for a woman with previous preterm pre-eclampsia and a borderline fundal height. Escalate by phone to the high-risk team if she cannot be seen sooner. Record the plan in her notes and give her a copy.
3. She asks whether she can wait for the next appointment to start aspirin and whether it will harm the baby. How do you answer?
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Answer: start today, do not wait. Explain that aspirin is one of the most studied medicines in pregnancy; at low dose it is not expected to harm the fetus or increase bleeding at delivery. The main benefit is through improved placentation, which is why earlier is better, but starting at 28 weeks is still reasonable in a high-risk woman. Discuss the uncertainty honestly: it lowers risk by roughly 10–20% in high-risk women, not a guarantee. Continue until 36 weeks or delivery unless the clinician advises otherwise. Do not use aspirin to replace surveillance. Ask about any history of asthma with aspirin sensitivity, peptic ulcer, or bleeding disorder. Give the first dose in clinic if possible, document counselling, and arrange the earlier review. If she declines, document informed refusal and continue close monitoring.