The eutherian placenta is derived from or In mammals placenta is formed by
Yolk sac
Amnion
Allantois
Chorion allantois
(d)Placenta is formed from allantois and chorion e.g., Eutherian mammals (Rabbits)
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 $D$
Head region of the sperm contains
Antrum is cavity of
In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was
Coelom derived from blastocoel is known as
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