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Tubal Reversal Pregnancy Study
A Decade of Observation

Pregnancy Rates By Fallopian Tube Lengths

The tubal lengths that remain after a tubal ligation affect the chances of getting pregnant after tubal ligation reversal. (The fallopian tube length before a tubal ligation is about 10 cm or 4 inches.)

Tubal segment lengths were measured routinely during reversal surgery and recorded in operative reports during our surgeries. (Tubal length measurements were not part of the electronic database at the beginning of the study interval, so the numbers in the following table are less than the total number of patients during the entire period covered by the study.) The average length of the fallopian tubes after repair was correlated with the likelihood of pregnancy after tubal repair (Table 6).

Women with longer tubal lengths were more likely to get pregnant than women with shorter tubal lengths following tubal reversal surgery. 83% of women with tubal lengths of 7.5 cm or longer became pregnant. The probability of pregnancy declined as tubal length decreased, but even women with the shortest tubes (less than 2.5 cm) became pregnant. Although previously unreported in the medical literature, a repaired fallopian tube of any length can result in pregnancy. Based on reports by women with only 1 fallopian tube, we have discovered that tubal lengths as short as 1 cm can result in a normal pregnancy.

Table 6. Pregnancies by Tubal Length (cm)

Length Total Women Pregnant (Number) Pregnant (Percent)
7.5+ 824 684 83%
5.0-7.4 4949 3621 73%
2.5-4.9 3114 1932 62%
<2.5 221 97 44%

Tubal Ligation Method And Tubal Length

When tubal ligation method and average tubal length are taken into account simultaneously, the amount of fallopian tube remaining after a sterilization procedure turns out to be the more important factor predicting the success of tubal reversal surgery. The less damage that occurs to the fallopian tube during a sterilization procedure, the more remains to be able to function normally once the tube has been surgically repaired. This explains the why women with tubal clips and rings – that cause the least amount of damage – are most likely to get pregnant after tubal reversal, as shown in the previous page of this report.

The complete Tubal Reversal Pregnancy Study: A Decade of Observation can be viewed by using the following links:

Table of Contents

24 thoughts on “Tubal Reversal Pregnancy Study Report 2011 – Fallopian Tube Lengths”

  1. Malerie says:

    I recently had a tubal reversal I had two clips on each tube. After the reversal you said my tubes were 7 cm long and it great shape. What are my chances of conceiving twins? Can I increase my chances any?

    1. Dr. Monteith says:

      Tubal reversal does not increase the chance of twins. The chance of anyone having twins is about 1 out of 200. Having your tubes reconnected does not increase that chance. There is nothing you can do other than take infertility medications.

  2. Virgen says:

    Hi there I send you guys my info via fax and paperwork of my tubal ligation about five month ago and haven’t had an answer from you guys.

    1. Dr. Monteith says:

      Thanks for contacting us. Sometimes when people send records they dont send their contact information or we dont get the records. We usually respond within 24 hours. Give us a call (919)968-4656 on Monday and we will provide you with more information.

  3. Kristen says:

    I had the clips put on 9 years ago. I’m 34 and now married and would like another baby. My doctor said there are 2 clips on each tube and it cannot be reversed. I would like a second opinion, we refuse to give up hope. Could you give me an opinion on my chances for a reversal?

    1. Dr. Monteith says:

      Tubal clips are excellent for reversing. The chance of pregnancy success could be as high as 80%. You should send us the tubal ligation operative report. As long as the clips are closed together (most times they are) then you should have good chances at pregnancy. Call us at (919)968-4656 if you want to talk more about tubal reversal surgery or have questions about getting your records.

      The following link will answer most of your questions about tubal reversal. This is the MOST HELPFUL INFORMATION to read when considering reversal at our office. Each question has a link to more information about the question: Frequently asked questions about tubal reversal

      To see why patients travel to see us read this impressive article on our March babies (you will even see many mom’s who had tubal clip reversal): March 2016 Tubal Reversal Baby Shower

  4. Anonymous says:


    I was left with 4 and 6 cm after my surgery was complete by you guys. I am 34 going on 35. I was told that I had good flow with both my tubes. This Is my third month trying. What are my chances of conceiving?

    1. Dr. Monteith says:

      We recommend trying for a full year before becoming concerned. Call us if you have any questions.

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