Placenta is present in
All mammals
Metatherians
Eutherians
Prototherians
Which one of the following is the incorrect match of the events occurring during menstrual cycle?
During the development, the point of entry of sperm in the eggs at fertilization
The estrous cycle occurs in
When both $LH$ and $FSH$ attain peak level in the menstrual cycle ?
Embryo at $16$ -celled stage is called