Reference for Yevamot 200:20

ויש לך אחרת שאף על פי שלא נתפשה מותרת ואי זו זו שקדושיה קידושי טעות שאפילו בנה מורכב לה על כתפה ממאנת והולכת לה:

might cause her foetus to degenerate into a sandal.<span class="x" onmousemove="('comment',' A flat, fish-shaped abortion. V. n. on [H] supra 12b. ');">⁶⁴</span> A nursing wife,<span class="x" onmousemove="('comment',' Is permitted the use of an absorbent. ');">⁶²</span> because she<span class="x" onmousemove="('comment',' Were she not to use one. ');">⁶³</span> might have to wean her child [prematurely]<span class="x" onmousemove="('comment',' Owing to her second conception. ');">⁶⁵</span> and this would result in his death. And what is the age of such a minor?<span class="x" onmousemove="('comment',' Who, though capable of conception, is exposed to the danger of death. ');">⁶⁶</span> From the age of eleven years and one day until the age of twelve years and one day. One who is under,<span class="x" onmousemove="('comment',' When no conception is possible. ');">⁶⁷</span> or over this age<span class="x" onmousemove="('comment',' When no fatal consequences are involved in conception or birth. ');">⁶⁸</span> must carry on her marital intercourse in the usual manner. This is the opinion of R. Meir. The Sages, however, said: The one as well as the other carries on her marital intercourse in the usual manner, and mercy will be vouchsafed from heaven,<span class="x" onmousemove="('comment',' Divine mercy will safeguard her from danger. ');">⁶⁹</span> for it is said in the Scriptures, The Lord preserveth the simple!<span class="x" onmousemove="('comment',' Ps. CXVI, 6, those who are incapable of preserving themselves. Tosef. Nid. II. supra 12b q. v. notes. Now, since a minor may not make a declaration of refusal unless she is under the age of twelve years and one day, and since a minor under that age either dies if she conceives, or does not conceive at all if she is younger, how could our Mishnah speak of a minor who made a declaration of refusal and who also had a child? ');">⁷⁰</span> — [The case of our Mishnah] is possible with a mistaken betrothal,<span class="x" onmousemove="('comment',' When a condition which remained unfulfilled was attached to it. In such a case, the woman may leave her husband without a letter of divorce and is, consequently, permitted to marry a priest. Her son who is, therefore, a legitimate priest may well be subject to the restrictions enumerated in our Mishnah. Cf. supra p. 690. n. 6. ');">⁷¹</span> and on the basis of a ruling of Rab Judah in the name of Samuel. For Rab Judah stated in the name of Samuel in the name of R. Ishmael: And she be not seized<span class="x" onmousemove="('comment',' Num. V. 13. (E.V., Neither she be taken in the act), referring to a woman who was defiled secretly and there were no witnesses against her. ');">⁷²</span> [only then<span class="x" onmousemove="('comment',' Only if she was not seized, i.e., she did not act under compulsion but willingly. Cf. supra 56b. ');">⁷³</span> is she] forbidden;<span class="x" onmousemove="('comment',' To her husband. ');">⁷⁴</span> if, however, she was seized<span class="x" onmousemove="('comment',' Violated. ');">⁷⁵</span> she is permitted;<span class="x" onmousemove="('comment',' To her husband. ');">⁷⁴</span> there is, however, another kind of woman who is permitted<span class="x" onmousemove="('comment',' To her husband. ');">⁷⁴</span> even if she was not seized.<span class="x" onmousemove="('comment',' Cf. supra n. 2. ');">⁷⁶</span> And who is she? — A woman whose betrothal was a mistaken one,<span class="x" onmousemove="('comment',' Cf. supra p. 691, n. 14. ');">⁷⁷</span> who may, even if her son sits riding on her shoulder, make a declaration of refusal [against her husband] and go away.<span class="x" onmousemove="('comment',' In any subsequent intercourse, whether lawful or illicit, her status is that of feme sole who had never before been married; v. Keth. Sonc. ed. p. 298, notes. ');">⁷⁸</span>

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