Does taking Althea two days after sex prevent pregnancy?

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I read your query and understood your concern.

If you have had unprotected sex and started taking Althea (a combined oral contraceptive pill containing Cyproterone Acetate 2 mg and Ethinylestradiol 35 mcg) two days later, that is not a reliable way to prevent pregnancy. Althea is intended for regular use to prevent pregnancy in advance, not as emergency contraception. Because the unprotected sex occurred two days earlier, it will not effectively block ovulation or fertilization after the event.

In such circumstances, emergency contraception such as Levonorgestrel (within 72 hours) or Ulipristal Acetate (within 120 hours) is the recommended option, ideally taken as soon as possible. Having already been two months late with your period complicates matters further; there is a possibility that ovulation has already occurred or, alternatively, you may already be pregnant. Therefore, the first step now is to rule out pregnancy immediately before resuming any hormonal pills.

Investigations to be done are as follows:

1. Urgent urine pregnancy test (home kit or laboratory).

2. If the result is unclear, obtain a serum beta‑human chorionic gonadotropin (hCG) test.

3. If pregnancy is confirmed, perform a pelvic ultrasound to confirm whether the pregnancy is intrauterine or ectopic.

Differential diagnosis is as follows:

1. Early pregnancy.

2. Anovulatory cycle (menstrual cycle without ovulation).

3. Polycystic ovary syndrome (PCOS)‑related hormonal imbalance.

4. Hypothyroidism.

The treatment plan is as follows:

1. First, confirm or rule out pregnancy before continuing Althea.

2. If pregnancy is not confirmed, continue Althea from the first day of the menstrual cycle for contraception, but use a backup method (such as condoms) for the first seven days.

3. If pregnancy is confirmed, discuss further steps in person with a gynecologist, depending on patient choice and gestational age.

4. Do not self‑medicate or attempt to abort on your own.

5. Emergency contraception should ideally be taken within seventy‑two hours of unprotected intercourse; regular pills such as Althea are not appropriate for that purpose.

Preventive measures are as follows:

1. Use condoms or reliable birth control consistently, especially in the context of irregular menstrual cycles.

2. Keep track of periods using applications or calendars.

3. Consider long‑term methods such as oral contraceptive pills only under the guidance of a doctor.

If menstrual cycles remain irregular, undergo evaluation for PCOS or thyroid issues.

Please perform a urine pregnancy test today and update here with the result. If positive, we will need to guide you properly. Even if negative, you may need hormonal regulation for your menstrual periods. Please keep me posted, and do not hesitate.

I hope that this answers your query.

Kindly follow up if you have more doubts.