Same-sex marriage

Human In Vitro Gametogenesis and the Same-Sex Marriage Debate

Written by César Palacios-González

It seems that in the not-so-distant future, scientists will be able to create functional human gametes (i.e. eggs and sperm) in a laboratory setting. In other words, they will be able to create human gametes outside of the human body. And just as there is in vitro fertilization (IVF), there will be in vitro gametogenesis (IVG). This means that our already long list of human reproductive acronyms –IVF, PGD, ICSI, PNT, PBT1, PBT2, MST, UTx, CT, etc.–  will get a bit longer. At present, some of the best biology labs from around the world are actively working on how to achieve such goal, and non-human animal models have shown some amazing results.

For starters, scientists have successfully derived in a laboratory setting mouse oocyte-like cells and sperm-like cells from induced pluripotent stem cells and embryonic stem cells. And, most surprisingly, they have been able to create what has been called “cross-sex gametes”. This means that they have been able to create sperm-like cells from female mice, and oocyte-like cells from male mice (I use the terms ‘sperm-like’ and ‘oocyte-like’ because these cells are not identical to naturally occurring gametes). Some of such cross-sex gametes have, in turn, been capable of producing live offspring. Continue reading

Plausibility and Same-Sex Marriage

In philosophical discussions, we bring up the notion of plausibility a lot.  “That’s implausible” is a common form of objection, while the converse “That’s plausible” is a common way of offering a sort of cautious sympathy with an argument or claim.  But what exactly do we mean when we claim something is plausible or implausible, and what implications do such claims have?  This question was, for me, most recently prompted by a recent pair of blog posts by Justin Weinberg over at Daily Nous on same-sex marriage.  In the posts and discussion, Weinberg appears sympathetic to an interesting pedagogical principle: instructors may legitimately exclude, discount or dismiss from discussion positions they take to be implausible.*  Further, opposition same-sex marriage is taken to be such an implausible position and thus excludable/discountable/dismissable from classroom debate.  Is this a legitimate line of thought?  I’m inclined against it, and will try to explain why in this post.**  Continue reading


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