Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to prevent spotting between periods [title] Take birth control pills. [step] Oral contraceptives, or birth control pills, are frequently used to manage spotting. Birth control pills regulate the hormonal changes that occur during your menstrual cycle.

Ending1: [substeps] Birth control pills can help to establish a regular cycle and avoid overgrowth of the uterine lining in women that do not routinely ovulate. In women that do ovulate, birth control pills work to treat abnormal, heavy, or excessive bleeding during menstruation. Ending2: These include, but are not limited to, pregnancy hormones, mood stabilizers, herbal birth control pills, anti-depressants, or selective serotonin reuptake inhibitors. [substeps] They come in pill form, to relieve cramps or flushing outfills. Ending3: They may increase menstrual cramps, tense the uterus (still known as a uterus), and make it difficult to get pregnant. [substeps] There are no known side effects associated with the hormonal changes. Ending4: Studies suggest that estrogen levels are higher on oral contraceptives than other forms of birth control as a result. [substeps] Oral contraceptives that suppress your body's hormonal mechanisms allow for faster ejaculation and progesterone production.

Answer format: ending1/ending2/ending3/ending4