Estrogen pills may be prescribed to lessen the symptoms of menopause, like hot flashes. Estrogen is used in birth control pills to prevent conception. The thickness of the endometrium changes along with the female's menstrual cycle. Older women may have an estrogen deficiency as they begin menopause.
An oil platform, offshore platform, or (colloquially) oil rig is a large structure with facilities to drill wells, to extract and process oil and natural gas, or to temporarily store product until it can be brought to shore for refining and marketing.n oil platform, offshore platform, or (colloquially) oil rig is a large structure with facilities to drill wells, to extract and process oil and natural gas, or to temporarily store product until it can be brought to shore for refining and marketing.
Larger rigs are capable of drilling through thousands of metres of the Earth 's crust, using large  mud pumps  to circulate drilling mud (slurry) through the drill bit and up the casing annulus, for cooling and removing the cuttings while a well is drilled. Hoists in the rig can lift hundreds of tons of pipe.