To begin with, your doctor will likely ask you a bunch of questions to determine the reason(s) behind why you want to change your birth control. Questions, like:

What are you using now? Obvious question  

Do you have any children? How many? This is important to understand your long-term goals.

How many children do you want and how soon? Your doctor will not likely recommend the intrauterine device (IUD), an implant, or monthly injections because they are longer lasting.

Are you finished having children? This is important because you would be a candidate for longer term contraption or sterilization. Most obstetrician/gynecologists recommend that if you are considering sterilization, it is safer for the man or your partner have a vasectomy because it doesn’t require general anesthesia.

Why are you considering changing your form of contraception? Is it due to side effects, concerns over how it works, safety, or lifestyle factors?

Who should go on birth control?

Any woman of childbearing age who is at risk for having a baby even if not sexually active currently. Many times, the sex act is not planned.

Should I give my body a break? Not necessary especially if you don’t want to get pregnant. The Pill does not build up in your system. In fact, the overall level of hormones is lower than if you were off the Pill and having monthly periods naturally

One or multiple partners? It’s always important to protect yourself from STIs or sexually transmitted infections such as gonorrhea, chlamydia, and trichomonas. This is best accomplished with condoms.

How active is your lifestyle? Daily pill taking can be difficult for women who travel a lot, away from home, or work varied hours.

Medical conditions that may affect the type of contraception?

Women with polycystic ovarian syndrome (PCOS) will benefit the most with the Pill to help suppress then excess hormones, mostly testosterone, that can cause hair growth in unwanted places, acne, glucose intolerance, and weight gain.

Women with conditions that cause blood to clot more easily such as antiphospholipid syndrome and some autoimmune diseases like lupus should not go on hormone-based contraception.