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The Torah Learning Library of Yeshivat Chovevei Torah

Category: Science & Medical Ethics

Fasting for Pregnant and Nursing Women – a teshuvah by Rabbi Nahum Rabbinovitch

Rabbi Dov Linzer (Posted on July 19, 2018)
From the Lindenbaum Center for Halakhic Studies

Shulkhan Arukh (OH 554:5) states simply that pregnant and nursing women must fast on Tishah b’Av. Is this indeed the case?  What if she is concerned about her health, or the health of the baby? Is it permitted only if she is first feeling weak?…

May the Humra Di’R. Zeira be Relaxed in Cases of Halakhic Infertility?

Rabbi Aryeh Klapper (Posted on June 18, 2018)
From the Lindenbaum Center for Halakhic Studies

Introduction “Halakhic infertility” occurs when observance of hilkhot niddah results in a woman ovulating only during the days that wife and husband are forbidden to be physically intimate. These situations result from post-biblical stringencies that lengthen the time of prohibition. This article discusses whether a couple may cease observing one such stringency, the humra di’R.…

May Kohanim Become Doctors – Part 2

by Rabbi Dov Linzer Posted on March 22, 2018

Two weeks ago we began to explore the question of whether kohanim may become doctors according to halakhah.   We noted that three halakhic arguments could be advanced to question the applicability of this prohibition to the case at hand: (1) Kohanim nowadays are only presumed (hazakha) to be kohanim and might only have the status of doubtful (safek) kohanim; (2) If we are all presumed to be tamei nowadays, then, according to Ra’avad, kohanim do not violate a Biblical prohibition by becoming tamei again by a corpse; (3) According to Yereim, it is not a violation for kohanim to become tamei by the corpse of a non-Jew. …

May A Single Man Fulfill The Mitzvah Of Pru U’rvu (procreation)?

Rabbanit Dr. Michal Tikochinsky (Posted on March 11, 2018)
From the Lindenbaum Center for Halakhic Studies

To read this teshuva in hebrew click here: Introduction Until the last generation, marriage and reproduction always went together. The only legitimate way of producing children was in the framework of marriage since non-marital sexual relationships are halakhically forbidden or, minimally, strongly discouraged.[1] In our generation, technologies have evolved that enable reproduction outside the context of marriage that do not cross these lines.…

May a Kohen Become a Doctor?

by Rabbi Dov Linzer Posted on March 8, 2018

This Shabbat we read Parashat Parah to remind us of the preparations that were necessary to undergo in order to be able to bring the korban pesah.  While it is hard for us nowadays to relate to the laws of corpse-impurity detailed in the maftir section, there is one case where these details really matter. …

May A Single Man Fulfill The Mitzvah Of Pru U’rvu (procreation)? (Hebrew)

Rabbanit Dr. Michal Tikochinsky (Posted on March 8, 2018)
From the Lindenbaum Center for Halakhic Studies

Playing God: The Theology of Genetic Engineering

by Rabbi Haggai Resnikoff Posted on May 12, 2017

  How do the Torah and rabbinic sources view the idea of genetic engineering, specifically as it relates to plants? The following sources are meant to prompt a discussion regarding this question. 1. VaYikra 19:19 אֶֽת־חֻקֹּתַי֮ תִּשְׁמֹרוּ֒ בְּהֶמְתְּךָ֙ לֹא־תַרְבִּ֣יעַ כִּלְאַ֔יִם שָׂדְךָ֖ לֹא־תִזְרַ֣ע כִּלְאָ֑יִם וּבֶ֤גֶד כִּלְאַ֙יִם֙ שַֽׁעַטְנֵ֔ז לֹ֥א יַעֲלֶ֖ה עָלֶֽיךָ׃ You shall observe My laws.…

From the Ramban’s Rainbow to the Theory of Evolution (Hebrew)

by Rabbi Dr. Yoel Bin-Nun Posted on December 2, 2016

Science and Halakhah: Sympathies and Strategies

by Rabbi Dov Linzer Posted on December 2, 2016

Should Facts Affect Faith?

by Rabbi Aryeh Klapper Posted on December 2, 2016

The Strange Fate of Astrology in Jewish Thought and Law

by Dr. David Shatz Posted on October 27, 2016