The prepubertal period refers to a stage of

Select the odd one out regarding the cells/layers associated with early embryonic development.

Choose the correct option regarding the statements provided:
$(1)$ The process of fusion of a sperm with an ovum is called fertilization.
$(2)$ $LH$ surge induces the rupture of the Graafian follicle.
$(3)$ An $8$-celled embryo is called a morula.
$(4)$ The length of the fallopian tube is $8-10 \, cm$.

What is the cause of pseudopregnancy?

An egg with yolk in the center and cytoplasm surrounding it is known as:

Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?