A 32-year-old healthy primigravida at 13+2 weeks’ gestation is referred by her primary care provider for urgent consultation at your high-risk obstetrics clinic. Four days ago, at the first prenatal visit, she reported feeling ‘unwell’ for a few days upon returning from an urgent family trip to a country with a Zika virus outbreak. By the time of initial prenatal visit, the patient had recovered from her illness; examination was unremarkable. First-trimester dating sonography was concordant with menstrual dates, and fetal morphology appeared normal, with a low risk of aneuploidy. Results of routine prenatal investigations are normal. The patient does not work, has healthy social habits, and takes only prenatal vitamins. She has not experienced nausea, vomiting, abdominal cramps, or vaginal bleeding. In very early gestation, she required emergent medical treatment for an allergic reaction after inadvertent exposure to a neighbor’s cat.