I. A 29-year-old woman (gravida 3, para 2) gave birth to a healthy baby after 38 weeks of gestation and delivered the intact placenta spontaneously. The pregnancy was complicated by preeclampsia, but fetal monitoring and ultrasound were normal throughout gestation. The predominant structures shown in the accompanying photomicrograph of the placenta are derived from which one of the following? a. A combination of fetal and maternal tissues b. Endometrial glands c. Endometrial stroma d. Fetal tissues e. Maternal blood vessels

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