The uterine lining of the female's uterine cycle is shed during the menstrual phase. Menstrual cycle is a reoccurring cycle which begins at menarche and ends at menopause. During menstrual cycle, the endometrial lining prepares for pregnancy.
This process by which an unexploited niche is explored by organisms and then tries to thrive is succession. In this case, primary succession is observed. Thank you for your question. Please don't hesitate to ask in Brainly your queries.