Please choose the correct ending to complete the given sentence: Health: [header] How to cure irregular menstruation [title] Talk to your doctor about hormonal therapy. [step] Hormonal therapy works by interrupting the signals in your hypothalamic-pituitary-gonadal circuit, which links your brain to your ovaries. [substeps] By interrupting this circuit, the therapy can be used to stop ovulation and stabilize your hormonal ups and downs.

Ending1: Ask your doctor if hormonal therapy is right for you, and what treatment you need. [title] Tell your doctor about procedures you want to try to reverse. Ending2: [title] Avoid having sex early in the pregnancy. [step] This can inhibit your ovaries' ability to produce the hormones that are responsible for ovulation. Ending3: This will allow your menstrual cycle to get back on track. [title] Talk to your doctor about getting a prescription for oral contraceptives. Ending4: Switch to a low dose of estrogen during the period of pregnancy. Select a low dose of estrogen for the majority of the menstrual cycle.

Answer format: ending1/ending2/ending3/ending4