The cavity present in the graafian follicle is
Amniotic cavity
Archenteron
Antrum
Ostium
Identify the correct labeling in the diagram
Ovum is
What is the difference between a primary oocyte and a secondary oocyte ?
A cross section at the midpoint of the middle piece of a human sperm will show
Ejaculation of human male contains about $200 -300$ million sperms, of which for normal fertility ____ $\%$ sperms must have normal shape and size and at least ____$\%$ must show energetic motility.