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Which is the best regime to take Femilon, 21/7 or 21/5?

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The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Medically reviewed by

Dr. Vinodhini J.

Published At February 11, 2020
Reviewed AtOctober 12, 2023

Patient's Query

Hello doctor,

I am on birth control pill Femilon for the last three months and I have followed 21/7 regime from the last three months. I got my last two periods on the 6th and 7th pill-free days respectively. And now I have advised to follow 21/5 day regime by my gynecologist for proper efficacy of pill. I am still being confused, that I have to continue 21/7 regime or 21/5? My gynecologist said to me do not think about your menses just follow 21/5 regime whether menses come or not. So I want to ask is it normal to lost menses for two to three months, because I feel that if my menses came on 6th or 7th pill-free day on 21/7regime, then if follow 21/5 then I have to start my pack on the 6th day after five pill-free days. And if my menses will not come in these five days then after starting the new pack my menses will not start still a month, is it normal? What I have to do?

Answered by Dr. Balakrishnan R

Hi,

Welcome to icliniq.com.

How are you doing? I would sincerely advise you to keep having pill in the 21 pills, 7 pill free cycles. This will avoid all the confusion. Hormone control will be the same if you take 7 pill-free or 5 pill-free cycle. We give the gap for proper hormone withdrawal so that the bleeding will be completed and the inner lining of the uterus is completely lost. So I would say you just follow the three weeks pills and one week pill-free cycle.

Patient's Query

Thank you doctor,

Yesterday, I consulted my nearby gynecologist in my city and she cleared her all my conditions. She prescribed that I must have to wait for my period after completing 21 days of Femilon and after this, I have to start it again on the fifth day of period. A gynecologist who had done my D and C prescribed me Femilon, and also advised me to retake the pill on fifth day of menses after completing one pack. But after all I was confused to see all posts of 21/7 and 21/5 of pills. So I want to ask you that may I forget all this matter and follow my gynecologist advise who have treated and guided me this pill that I should have to wait for my menses after finishing the pack and retake the pill on the fifth day of menses?

Answered by Dr. Balakrishnan R

Hi,

Welcome back to icliniq.com.

See, the basic principles of endocrinology do not change with doctor. By using cyclically OCP (oral contraceptive pill), we are simulating the basic body hormones. During the first three to four days of periods, the decision is taken as to which follicles are to ovulate this month. Be it for contraception or for stopping cysts or endometriosis, we do not want follicles to grow. So it is advisable to start the pills before this recruitment, so as not to wait for periods. Then as you keep having the pills, the inner lining of uterus keeps increasing, so it has to be shed one day, so to keep it as close to the natural cycle, we need to have for 21 days. Do not bother about hormone suppression principle, just have the pill for 21 days, be pill free for 7 days, start the next packet from the eighth day, irrespective of getting periods or not.

I hope this helps.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Balakrishnan R
Dr. Balakrishnan R

Obstetrics and Gynecology

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