LH

You should get an LH test if you have irregular or absent periods, difficulty conceiving, or symptoms of PCOS such as acne or excess hair growth. Men may need it for low sperm count, low libido, or erectile problems. It is also recommended for early or delayed puberty, suspected menopause, and pituitary disorders.

No fasting is required for an LH test. Women should usually test on days 2–5 of the menstrual cycle, unless the doctor advises testing mid-cycle for ovulation. Inform your doctor about oral contraceptives, hormone therapy, or fertility medicines, as these can affect results. Stop biotin supplements 48–72 hours beforehand.

No, fasting is not required for an LH test. You can eat and drink normally before giving your sample. However, timing matters for women: the test is usually done on days 2–5 of the menstrual cycle, unless your doctor advises otherwise. Stop biotin supplements 48–72 hours beforehand.