In the Torah, Bereshit 3:16, all women receive the curse of a painful childbirth and their subservience to men. This is all because Chava made the choice to make Adam eat from the tree. Why should all women suffer for the choice of one woman?
all humans must also die because of Adam and Chava. this is not a punishment but a consequence. If a couple has a venereal disease and the child also contracts it, he is not being punished but rather paying the consequences of his parents actions.
when chava was punished, her physical and spiritual makeup changed and she transfered this to her offspring
source Rabbi Uziel Milevsky audio class
According to the Ariza"l, both Adam and Chava's soul were made up of all the souls of all generations - נשמה הכוללת - an all encompassing soul. This is because they were the progenators of the human race, and whatever defect they caused on their souls would be transferred and imprinted onto all future generations:
In the Lurianic systemisation of preceding Kabbalah, the anthropomorphic designation for Adam Kadmon describes its arrangement of the latent future sephirot in the harmonised configuration of man. However, Adam Kadmon itself is divine light without vessels, including all subsequent creation only in potential. This exalted anthropomorphism denotes that man is both the theocentric purpose of future creation, and the anthropocentric embodiment of the divine manifestations on high. This mythopoetic cosmogenesis and anthropogenesis enables the "Adam soul" to embody all human souls: the collective Yechidah ("singular") soul essence in Adam Kadmon, and the collective Neshamah ("soul") revealed soul in the Biblical Adam Ha-Rishon in the Garden of Eden.
Thus, when Chava caused Adam to sin, she caused damage not only to her soul, but also that damage became imprinted upon all future souls.
We find this concept in the Talmud:
The Gemara says in Shabbos 55a:
אמר רב אמי אין מיתה בלא חטא
Rav Ami said: "There is no death without sin"
The Gemara says in Bava Basra (17a):
תנו רבנן ארבעה מתו בעטיו של נחש
The Rabbis learned: "There were four who died only on account of the "Hit of the Snake"
בעטיו של נחש - בעצתו של נחש כלומר לא היו ראוין למות אלא שנגזרה גזירת מיתה על כל תולדותיו של אדם הראשון בעצתו של נחש בעטיו תרגום של עצתו כדכתיב (דניאל ו) אתייעטו כל וגו' וכן התיב עטא וטעם (שם ב):
The hit of the Snake: from the advice of the snake, meaning that really before the sin, Man was not meant to die, but it was decreed upon the progeny of Adam Harishon that they would be subject to death due to the advice of the snake.
Thus, with the Idea of the Arizal quoted above in conjunction with the Gemara passages with Rashi's commentary it demonstrates for us that the punishment of pain in child labor, just like death, would be applied not just to her, but to all future woman.
Rabbi Sorotzkin and others point out that the entire incident occured before the first Shabbos. Thus, this was part of the time of creation. That is "free will" was created and instituted then. Adam had free will to choose to obey or disobey Hashem and the usage of free will at this time established the nature of mankind for the future.
Had Adam and Chava not eaten, they would have been allowed to eat it after shabbos (when creation had been completed). Thus, the action and the results affected the entire creation which caused the rest of humanity to be on the level that continued.
See Rav Hirsch on 3:16
(From memory) I think that Rabbi Leibtag had a posting from Virtual Bais Medrash that discussed that what was done at this point established the "Laws of Nature" for the future. Thus, it was not that all women were punished for the chet, but that what happened established the normal process of the world. Since it was still within the "six days of creation", it was not a change in nature, but the completion of creation.