Which one of the following is not the function of placenta?

The major function of placenta is to provide the nutrition to the growing embryo and facilitates the removal of carbon dioxide and waste products by diffusion. The placenta also secretes estrogen however, not oxytocin. Oxytocin is a hormone secreted by posterior pituitary gland during parturition. Thus, the correct answer is option (D), 'Secretes oxytocin during parturition.'