Can I do my blood test while on hormonal treatment?

Blood Tests While on Hormonal Treatment

Yes, you do not need to stop your hormonal treatment before your blood draw.

This applies to:

• Combined or progestogen-only contraceptive pills (OCP);

• Hormonal patches, rings, or implants;

• Hormone replacement therapy (HRT);

• Prescribed estrogen or progesterone treatments.

Do not stop your treatment before the test

Never stop a prescribed treatment without discussing it first with your doctor.

Stopping hormonal treatment before a blood test is not necessary and could be harmful if done without medical supervision.

How Lucis interprets your results

Lucis will interpret your results in the context of your treatment. This is actually useful: tracking your biomarkers over time while on a stable treatment gives you a meaningful baseline and helps detect any changes.

A note on sex hormones (estradiol, progesterone, LH, FSH)

If your panel includes sex hormones such as estradiol, progesterone, LH, or FSH, the timing of your test within your cycle matters more than whether you are on treatment.

If your cycle is regular (every 21 to 35 days) and you are booking the Complete panel, do your blood test between day 3 and day 8 of your cycle, counting day 1 as the first day of your period. If your cycle is irregular, you can book on any day.

If you are unsure about your specific treatment

If you have questions about how your treatment may affect your results, consult your doctor before your appointment.

Lucis does not provide guidance on stopping, adjusting, or modifying any prescribed treatment.