Amnion helps in
Respiration
Excretion
Nutrition
Protection from shocks
The estrous cycle occurs in
Vascular system and excretory organs are developed from
Extra embryonic membrane amnion is not found in amphibians because
The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly
Embryologists can presume the future organs of the embryo in