There is a medical condition known as "Uterus didelphys". Wikipedia describes it as follows:

Uterus didelphys (sometimes also uterus didelphis) represents a uterine malformation where the uterus is present as a paired organ as the embryogenetic fusion of the mullerian ducts failed to occur. As a result there is a double uterus with two separate cervices, and often a double vagina as well. Each uterus has a single horn linked to the ipsilateral fallopian tube that faces its ovary.

This is understandably an extremely rare thing. However this raises the question, what would be the din in regards to pidyon haben. If a woman gave birth to a boy from one womb then at a different time gave birth to a boy that formed in the other womb, would the 2nd require a pidyon haben?

  • 1
    sort of parallel judaism.stackexchange.com/q/22040/759
    – Double AA
    Commented Dec 23, 2013 at 21:48
  • Wouldn't it be determined who came out first regardless of two wombs?
    – sam
    Commented Dec 24, 2013 at 4:31
  • I think the OP is basing himself on the phrase "peter rechem", so there is a valid doubt.
    – Epicentre
    Commented Dec 24, 2013 at 6:41
  • Yea but by twins in the same womb it is determined by who comes out,classic case: Yaakov and Esav,see the Ketzos who explains Yaakov was the first in the womb,if I remember it correctly.
    – sam
    Commented Dec 24, 2013 at 13:45
  • 1
    If they are in the same womb, then whoever comes out first is first out of that womb. The question is asking that the first child did not "exempt" the other womb and maybe it will have its own "exemption." You do not see that from a case of one womb. Commented Jan 20, 2014 at 4:07

2 Answers 2


Someone asked this question online to Rabbi Yitzhak ben Yosef (posek and rabbi of Ramat Gan) here, and he responded as follows:

בהחלט שאלה נדירה ביותר. לכאורה כל תינוק הוא פטר רחם וצריכים שני הילדים פדיון צריך לבדוק האם הם פטר רחם דהיינו שלכול רחם יש פתח נפרד.

This is an extremely rare case. Seemingly, each infant is the"opener of the womb" and they both require pidyon. It would be necessary to check that each womb has a distinct opening in order for them to be peter rechem.

  • 4
    I can't believe this has actually been asked to a posek +1
    – Daniel
    Commented Feb 20, 2014 at 19:00
  • 2
    Can you provide some info for who Rabbi Yitzhak ben Yosef is? +1, well done. Commented Feb 20, 2014 at 19:07
  • @Daniel I originally heard the question from a Rov who had been asked it on a theoretical level. I think it's common enough that it could indeed happen.
    – Yehoshua
    Commented Feb 20, 2014 at 23:21
  • 2
    Does he mean separate cervices or vaginae? I suspect the OP's case would only ever happen with two cervices, yet we can test that the Halachik requirement of Yatza Rosho seems to apply when the baby's head leaves the vagina as well (I don't have proof of this, but YD 305:22 sounds that way and it certainly would seem surprising otherwise).
    – Double AA
    Commented Aug 21, 2014 at 3:27
  • @DoubleAA, It certainly does sound like two cervices. Also, from the ways he says "צריך לבדוק" makes it sound like it's something that's not so easy to see externally, which I would imagine two vaginae would be, though I'm not so sure.
    – jake
    Commented Aug 21, 2014 at 18:31

the mishna in bechoros states that a child born after a ceaserian birth does not require pidyon (this is codified as halcha). gemara explains that although he is considered the opener of the womb, he is not the first child, and he is not considered the bechor for pidyon.

We can infer from here, that any child who has an older brother from his mother, cannot be considered a bechor for pidyon, even if he is a bona fide peter rechem. Which would mean that in your case, the second peter rechem will not require pidyon.

  • Is the point in the gemara that he's not the first child of this woman or not the first child in that womb? If the first the child in the second womb would not be a bechor, but if the second it would seem he is a bechor.
    – Orion
    Commented Mar 26, 2018 at 0:39
  • @Orion the point is clearly the woman, the idea is that there are multiple measures for bechor, opening the womb is just one of them, the gemara refers to this idea as בכור לדבר אחד.
    – Hershy S.
    Commented Mar 26, 2018 at 1:43

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .