<prompt> Amount of estrogen in low dose oral contraceptive pills:30 micro grams40 micro grams50 micro grams20 micro grams  <response>: Ans. is a i.e. 30 micro grams Low dose - 30microgm Very low dose - 20microgram Standard dose 50 microgram When the pill first came out in the 1960s, it had 150 micrograms of estrogen. Side effects were common, and that formula was soon taken off the market. Nowadays, the highest dose available is 50 micrograms of estrogen, but even that is rarely prescribed anymore. Today, most pills have 35 micrograms or less of estrogen, an amount thats generally called low dose. In recent years theres been a trend toward even lower levels of hormones. Ultra-low-dose pills have 20 micrograms of estrogen or less. 