Tosefta for Yevamot 83:23
גזרה שמא תעשה עוברה סנדל אי הכי דידיה נמי
will have been fulfilled she might be examined!<span class="x" onmousemove="('comment',' If she is found to be pregnant it will be obvious that the child's father was the first husband; if not, the father of the child born subsequently will be the second husband. After three months of conception the marks of pregnancy may be distinguished. ');"><sup>36</sup></span> — R. Safra replied: Married women are not examined, in order that they may not become repulsive to their husbands. Then let her be examined by her walk!<span class="x" onmousemove="('comment',' A pregnant woman, walking on soft soil or loose earth, leaves a deeper impression than a non-pregnant woman (Responsa of the Geonim, Cf. Rashi a.l.). ');"><sup>37</sup></span>