After how many days of Regestrone does the period occur?

Q. Why is my period delayed even after taking Regestrone?

Answered by
Dr. Poonguzhali Liston
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on May 26, 2021

Hi doctor,

I have a 3-year-old child. Now I want to avoid unplanned pregnancy. Usually, mine is a 27-day cycle. I got my last period 35 days ago. Till now, I have not got the period. I have not done any pregnancy tests. I started taking Regestrone tablets from last week for two days (morning and night, one pill each) still, my periods did not start. But I am having period pain. What to do? Please help.



Welcome to

I understand your concern. Firstly, Regestrone (Norethisterone) has to be taken for five days twice or thrice daily. A lesser dose may not help to induce your period. The lesser dose may be the cause of your delayed period. Secondly, even after completion of dosage, it takes about 7 to 10 days to start. Thirdly as you have not taken a pregnancy test, I would suggest you kindly do that. If it is negative kindly revert. Also, kindly revert to the contraceptive option. Regards.

Hi doctor,

Thanks for the reply.

Just now, I tested with the pregnancy test kit, and it shows negative only. I have a doubt. I took two Regestrone tablets. Would that be a reason for the negative pregnancy result?



Welcome back to

Do not worry. Regestrone does not interfere with a pregnancy test. Urine pregnancy test measures hCG (human chorionic gonadotropin) hormone different from Progesterone (Regestrone). So the result is very reliable. So now, stay stress-free. Your period should come in a few days. Once you start menstruating, you can decide on the contraception you want to avoid unwanted pregnancy. Any doubt or query kindly get back to me. Stay safe. Regards.

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
What is the reason for irregular periods after stopping birth control pill?

.. is not to be taken regularly. There are two phases of the menstrual cycle first 15 days estrogenic phase and second secretory phase. These tablets are high dose hormonal and delay ovulation. So depending upon which phase you took medicine, the period w   Read full

Could delayed periods be a sign of early onset of menopause?

.. have been regular with your menses these years and this is the first episode at 53 years of age when the menses have been delayed by two weeks, the causes can be a possible initiation of perimenopausal stage where menses are often delayed for a month o   Read full

Why did I get bleeding after taking I-pill?

I-pill is emergency contraception ... Secondly, you took I-pill twice in one month would definitely create some hormonal imbalance whic   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

PCOS and Liver Problems
The hormonal imbalances in polycystic ovary syndrome could cause liver diseases. Read the article to know the relationship between these medical conditions.  Read more»
Inferior Alveolar Nerve Lateralization Technique
The inferior alveolar nerve lateralization technique is a surgical lateralization technique to reposition the nerve. Read the article to know more about this.  Read more»
COVID-19 and Ebola: Similarities and Differences
This article gives a comparison and broader overview of the outbreak of the two deadliest diseases that showed a greater incidence over the last two decades.  Read more»

Ask your health query to a doctor online?

Ask an Obstetrician & Gynaecologist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.