Which one of the following develops from the trophoblast
Placenta
Allantois
Epidermis of the skin
Yolk sac
Which of the following hormones is not a secretory product of human placenta?
The role of placenta is
The persistence of corpus luteum during pregnancy is due to a hormone known as
Which of the following secretes the hormone relaxin during the later phase of pregnancy?
$A$ : Placenta is connected to the embryo through an umbilical cord which helps in the transport of substance to and from the embryo
$R$ : Placenta acts as an endocrine tissue