Home use kits for determining a women's fertile period depend on the detection of one hormone in the urine. This hormone is

Embryonic body form stage is characterised by

The capsule enclosing testis of mammal is called as

$A$ : Blastocyst undergoes gastrulation to produce the three germinal layers.
$R$ : This involves cell movements (morphogenetic movement) that eventually help to attain new shape and morphology of embryo

Corpus luteum secretes.....

The following graph of relative concentrations of the four hormones present in the blood plasma of a woman during her menstrual cycle. Identify the hormones $A, B, C$ and $D$