Here are some quick tips on how to distinguish classic crystal from plain glass. 1  Hold up a glass to the light. 2  If the glass acts as a prism and you see a rainbow you are holding crystal. 3  If not, it is just plain glass. 4  When struck, crystal produces a musical ring. 5  Glass does not.
Hormonal control of menstrual cycle. The ovarian hormones circulate in the blood and are excreted in modified forms in the urine. Estimation of the urinary output by chemical methods gives an indication of the blood levels and of the total production of these substances.
Estrogen a hormone that primarily regulate the growth, development, and function of the female reproductive system which are the ovaries and placenta. It works in accordance t â¦ o with your body's health to make sure that your periods are normal and do take place when expected and the same applies to pregnancy.