Halakhah for Niddah 5:3
תִּינוֹקֶת בַּת יוֹם אֶחָד, מִטַּמְּאָה בְנִדָּה. בַּת עֲשָׂרָה יָמִים, מִטַּמְּאָה בְזִיבָה. תִּינוֹק בֶּן יוֹם אֶחָד, מִטַּמֵּא בְזִיבָה, וּמִטַּמֵּא בִנְגָעִים, וּמִטַּמֵּא בִטְמֵא מֵת, וְזוֹקֵק לְיִבּוּם, וּפוֹטֵר מִן הַיִּבּוּם, וּמַאֲכִיל בַּתְּרוּמָה, וּפוֹסֵל מִן הַתְּרוּמָה, וְנוֹחֵל וּמַנְחִיל. וְהַהוֹרְגוֹ, חַיָּב. וַהֲרֵי הוּא לְאָבִיו וּלְאִמּוֹ וּלְכָל קְרוֹבָיו כְּחָתָן שָׁלֵם:
A baby girl one day old can become impure as a <i>niddah</i>. At ten days old she can become impure as a <i>zavah</i> [a female who has certain types of atypical genital discharges, distinct from her menses, which render her impure]. A baby boy one day old can become impure as a <i>zav</i>, or impure by having <i>nega'im</i> [diseased patches on skin, clothes, or houses that create impurity], or impure through [contact with] the impurity of a corpse; and he creates <i>zikah</i> [the bond between a widow waiting for either leverite marriage or to perform <i>chalitzah</i>, and the man upon whom the obligation to perform leverite marriage has fallen] for <i>yibum</i> [the obligation to perform leverite marriage]; and he can exempt one from requiring <i>yibum</i> [i.e. if his father dies, he counts as a son to except any of his uncles from having to do <i>yibum</i>]; and he can feed <i>terumah</i> [i.e. his existence can render <i>terumah</i> permissible to one for whom it was formerly forbidden]; and he can render <i>terumah</i> to be forbidden [to one who was formerly permitted to eat it]; and he can inherit or cause others to inherit [portions of an estate]; and one who kills him is liable [for murder]; and he is thereby fully like a son-in-law to his father and to his mother and for all his relatives.