A 32-year-old woman, gravida 2, para 1, presents to the clinic at 8 weeks of gestation for her initial prenatal visit. Her blood type is O-negative. Her previous pregnancy was complicated by severe preeclampsia requiring an indicated preterm delivery at 31 weeks of gestation. Her vital signs today are within normal limits, and a viable intrauterine pregnancy is confirmed by ultrasound. Assuming the current pregnancy progresses normally without acute complications, arrange the following recommended maternal screening and prophylactic interventions in the correct chronological order from earliest to latest in gestation.
- 1Perform cell-free fetal DNA screening
- 2Initiate daily low-dose aspirin prophylaxis
- 3Perform a comprehensive fetal anatomy ultrasound
- 4Administer prophylactic anti-D immune globulin
- 5Obtain a rectovaginal swab for Group B Streptococcus culture
Cevap
The correct chronological sequence is: Cell-free fetal DNA screening (≥10 weeks), Low-dose aspirin prophylaxis (12-16 weeks), Fetal anatomy ultrasound (18-22 weeks), Anti-D immune globulin (28 weeks), and Group B Streptococcus screening (36-37 weeks).
Optimal prenatal care requires strict adherence to the physiological and gestational timeline. Cell-free DNA for aneuploidy is available starting at 10 weeks. Low-dose aspirin for preeclampsia prevention must begin between 12 and 16 weeks to ensure optimal placental development. The anatomy ultrasound is optimally performed at 18-22 weeks. Anti-D immune globulin is given universally to unsensitized Rh-negative mothers at 28 weeks. Finally, GBS rectovaginal screening is performed at 36-38 weeks to accurately predict intrapartum colonization.
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Anahtar Kavram
Chronological sequencing of routine and risk-indicated prenatal screening and prophylactic interventions.