Which hormone is secreted only post pregnancy in women?
Oestrogen
Progesterone
Luteinizing hormone
Chorionic gonadotrophin
Which of the following develops from ectoderm
In determinate cleavage, the spindle is
Accessory sexual character in female is promoted by
$A$ : The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass.
$R$ : The descendants of inner cell mass become the trophoblast cells
Study the flow chart. Name the hormones labelled as $A, B, C, D$ at each stage.
$A \quad B\quad C \quad D$