During embryonic development, the establishment of polarity along anterior/ posterior, dorsal/ventral or medial/lateral axis is called

The ratio of the nucleus to cytoplasm at the beginning of cleavage is

The amnion and chorion consist of which type of composition

Relative sizes of an egg cell, morula, blastula and gastrula are

Bartholin glands are situated

Ovum receives the sperm in the region of