In both chordates and non-chordates intestine develops from
Pharyngeal pouch
Ectoderm
Endoderm
Mesoderm
Inhibition of uterine contraction ceases and the bleeding and cramps of menstruation begin due to
Graafian follicles are produced by the ovary by the process of
Blastopore is found in
How many cleavages are completed in $16$ celled stage of egg.
Bartholin glands are situated