Part 1 of Essay
pills are an oral contraceptive for women. They are monophasic, biphasic, or triphasic. Each type contains estrogen and progestin in differing amounts. Monophasic birth control pills maintain the same levels of estrogen and progestin throughout the course, while biphasic pills keep the estrogen level the same while increa ....

Part 2 of Essay
.... rate for combination regimens and a 99.5% effectiveness rate for progestin only regimens in clinical trials. It is extremely important to take the pills on a regular basis and at a regular time of day (say after dinner or with breakfast every day) as effectiveness drops with improper usage. The birth control pill cannot be used as a "morning after pill" without the advice and monitoring of a physician. Common side effects of birth control pills are nausea; vomiting; cramps; bloating; breakthrough bleeding ....