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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

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

  1. sandra torres says:

    Had my tubes clipped in 2007 with hulka clips. Want to reverse to conceive another baby. What is the cost and how it works?

    1. Dr. Monteith says:

      Hulka clips are excellent for reversing. We can remove your clips and rejoin your tubes and provide you with a 80% chance of pregnancy success.


    @Sandy, I’m really interested in your outcome. I am 41 and really want surgery but I’m scared that it won’t work due to the information I’ve read.

  3. Sandy Bennett says:

    I am 42 years old and just had my TR done July 1 2013. I was concerned about my chances of success because of my age and because I had coagulation tubal ligation. According to the chart, my chances with those factors were about 26%. But after my surgery, Dr. Monteith said that I had long, healthy tubes (8 cm left on the left side and 6 cm on the right) and that should increase my chances. Also in my operative report, he mentioned on both sides my ovaries are “ovaulatory.” I’m now cautiously optimistic but don’t want to get overly excited just yet. I can’t find any charts of age and tube lengths.

  4. Bridget MacMillan says:

    Dr. Berger performed my Tubal Reversal Surgery in August 2002. It was a very pleasant experience. Dr. Berger and his staff were wonderful. One tube was 6.0 cm but was blocked, the other was only 5.5 but was open. I was told it only takes one open tube to become pregnant. We were blessed with 3 healthy Tubal Reversal babies. Our son was born in September 2003, Our daughter was born in September 2005, and one more surprise daughter was born in May 2007. I then had another Tubal Ligation done after she was born, since the birth control pill didn’t work for me. Our family is complete and we are so happy to have found Chapel Hill Tubal Reversal Center.

  5. micki Bailey says:

    It’s been 4 months since my surgery and I am still not pregnant! I know its not been to long but I’m afraid that there is something I could be doing to help ensure that I do get pregnant!! Am I just being to ancy or is there something I could be doing, besides just waiting each month, to increase my chances?

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