Please choose the correct ending to complete the given sentence: Youth: [header] How to balance hormones for acne [title] Use oral contraceptives. [step] If acne is thought to be complicated by a hormonal imbalance, your dermatologist may choose hormone replacement therapy (hrt) as part of the treatment. The most common hrt for acne is contraceptive therapy using birth control pills.

Ending1: Consult your doctor for more information on hrt treatment for your particular body type and age. [substeps] Ask your doctor how many iuds are currently prescribed for acne. Ending2: Hrt is typically more expensive than taking hormonal pills. Talk to your dermatologist about the benefits and drawbacks of hrt before you take it to see if it might be for you. Ending3: Over time, the pill will slow down the process and maybe even prevent a more serious acne flare. Talk to your doctor about using an hrt if you've had it before and you're concerned about the likelihood of it flare-ups. Ending4: These often contain estrogens, progestins or both in varying concentrations. The type and dosing of oral contraceptive is an important factor in acne treatment, and only a dermatologist specialized in their usage for this condition should be treating acne with hrt.

Answer format: ending1/ending2/ending3/ending4