Beginning 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 ....

Middle of Essay
.... 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 (light bleeding at the start of the regimen); spotting (light bleeding at times); change in menstrual flow (most commonly lighter flow than one is used to); breast changes su ....