Which of the following hormones is not a secretary product of human placenta?
a)	Human chorionic gonadotrophin	b)	Prolactin
c)	Oestrogen	d)	Progesterone

(b)

Prolactin is secreted by anterior pituitary gland, which stimulates mammary gland development during pregnancy and lactation after child birth. Placenta is a connection between the uterine wall of mother and their foetus. It helps in exchange of material between these two. Placenta secretes human chorionic gonadotrphin, oestrgen and progesterone.