The three phases of the uterine cycle in order are

Options

A. Menstrual `rarr` Luteal Ovulatory
B. Follicular `rarr` Luteal `rarr` Ovulatory
C. Menstrual `rarr` Proliferative `rarr` Ovulatory
D. Ovulatory `rarr` Follicular `rarr` Luteal

Answer

To determine the three phases of the uterine cycle in order, we need to understand the menstrual cycle and the changes that occur in the uterus throughout this cycle. The uterine cycle consists of three main phases:

1. **Menstrual Phase**: This is the first phase of the uterine cycle. It involves the breakdown of the endometrial lining of the uterus, leading to menstruation (the shedding of the uterine lining). This phase typically lasts for about 3 to 7 days.

2. **Proliferative Phase**: Following the menstrual phase, the proliferative phase occurs. During this phase, the endometrium (the lining of the uterus) begins to rebuild and thicken in preparation for a potential pregnancy. This phase is regulated by estrogen levels that rise as the follicles in the ovaries mature.

3. **Secretory Phase**: The third phase is the secretory phase, which occurs after ovulation. During this phase, the endometrium continues to thicken and becomes more vascularized, preparing for the implantation of a fertilized egg. This phase is regulated by progesterone, which is secreted by the corpus luteum after ovulation.

In summary, the three phases of the uterine cycle in order are:
1. Menstrual Phase
2. Proliferative Phase
3. Secretory Phase