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Multiple Choice Questions « Return to contents list Chapter 14, Question 1.1. Identify true statements from the following. A The oocyte is fertilized in the main uterine corpus. B The blastocyst invades the myometrium and its outer layer, the trophoblast, forms the placenta. C The trophoblast produces hormones almost immediately, notably human placental lactose (detected in pregnancy tests), which will peak at 12 weeks. D Placental morphology is complete at 4–5 weeks. E A heartbeat is established at 6 weeks. F None of the above.