The membrane investing the ovum just outside the membrana granulosa is
Zona pellucida
Theca interna
Vitelline membrane
Discus proligerous
Number of sperms present in a single ejaculation of semen contains
The disadvantage of parthenogenesis is
Hysterectomy is surgical removal of
In menstrual cycle other name of follicular phase is....
Cells of leydig are found in