The patient has read that the placenta produces hormones that are vital to the function of the fetus
It is evident that that the patient understands the function of the placenta when she states, "The hormone primarily responsible for the maintenance of pregnancy past the 11th week is: 1. "Human chorionic gonadotropin (hCG).".
2. "Human placental lactogen (hPL).".
3. "Estrogen.".
4. "Progesterone.".
4
Rationale 1: Human chorionic gonadotropin (HCG) begins to decrease as placental hormone production increases. It is not primarily responsible for maintenance of pregnancy past the 11th week.
Rationale 2: Human placental lactogen (hPL) stimulates certain changes in the mother's metabolic processes, but it is not primarily responsible for maintenance of pregnancy past the 11th week.
Rationale 3: Estrogen that is secreted by the placenta is in the form of estriol, and cannot be synthesized by the placenta alone. It is not primarily responsible for maintenance of pregnancy past the 11h week.
Rationale 4: Progesterone is primarily responsible for maintenance of pregnancy past the 11th week because it decreases the contractility of the uterus, thus preventing uterine contractions from causing spontaneous abortion.
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