Toby is a farmer who uses various equipment to plant his wide variety of seed fields. While Toby knows it is important to sanitize this equipment when does he specifically need to do so?
before use and when changing seed types
once per month
in between each seasonal change
whenever he remembers to

a chair, a bed, and a toothbrush

explanation:

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."