Menstrual flow occurs due to lack of
$FSH$
Oxytocin
Vasopressin
Progesterone
$FSH $ acts on ........, which help in the process of spermiogenesis.
Which of the following structure is found in blastula
Eggs having yolk in their centre of cytoplasm in peripheral layer are called
The branch of embryology which concerns with the study of abnormal embryonic development is termed as