At what stage the primitive streak in the chick embryo is formed
$12$ hours incubation
$18$ hours incubation
$72$ hours incubation
$24$ hours incubation
At which phase, both $LH$ and $FSH$ attain a peak level?
In the development of man which structures are formed from splanchnopleure.
There is a connective tissue cord extending between the testis and abdominal wall called
Relaxin (a hormone) is secreted by
When a foetus develops limbs and digits?