Question

the proliferative phase is labeled _______.
options: c, a, d, b

Explanation:

The proliferative phase of the uterine cycle (menstrual cycle) occurs after menstruation (labeled A, which is the menstrual phase) and involves the thickening of the endometrium as it rebuilds. Looking at the diagram, the phase labeled B corresponds to the proliferative phase (days around 6 - 14, typically), where the endometrium starts to grow and the spiral arteries and glands begin to develop. The other labels: A is menstrual, C is around ovulation/early secretory, D is secretory phase. So the proliferative phase is labeled B.

Answer:

B. B