When are scientific ideas modified

scientists form opinions based on evidence and decide how the idea should change.

Explanation:

scientific rarely change , because they are based on extensive edivence. new evidence leads to modification of ideas

"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."

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )