It is structural and functional unit between developing embryo (Foetus) and maternal body
Placenta
Yolksac
Cavity of uterus
Plug
Relaxin hormone is produced from
Assertion : During fertilization only head of spermatozoa enters egg.
Reason : If several spermatozoa hit the egg at same time, all can enter the egg.
Placenta is the region, where
Which of the following secretes the hormone relaxin during the later phase of pregnancy?
Identify $X$ from figure :