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(Sending this reply to you directly as well since I think it's important)

IVF is not a "fast food menu for children". It is a procedure for many women who want children but can't have them the "old fashioned way" used for various reasons, including health reasons (some women for instance don't ovulate normally), lesbian women using donor sperm, etc.

It sounds like what you're referencing is the CRISPR controversy where one scientist in China actually edited the genes of embryos, he went to jail and the whole thing is wildly controversial and not at all done as a general practice.

Due to the way IVF works, they do select embryos that are viable to proceed with a pregnancy, which means checking chromosome irregularities. This does filter out Down's syndrome in particular which I concede is its own ethical set of questions, but generally it just filters out cases where either no pregnancy would happen whatsoever (embryo would fail to implant) OR it would lead to a chemical pregnancy/miscarriage/etc -- the female human body is already "aborting" non viable pregnancies in those instances, it just saves the woman of the emotional hardship of implanting an embryo that literally would never be compatible with life and having to go through a miscarriage.

The side effect of testing chromosomes is that the embryology lab does indeed find out which embryos will lead to a female vs male fetus. A lot of countries (including the biggest offenders of sex selective abortions, such as China and India) outright ban informing the patient of the sex of the embryo or letting them choose the sex of the baby, though weirdly the USA does not, in my experience from IVF support groups, most women ask to not know the sex of the baby anyway.

Beyond that, there is no "selection of physical traits". I mean, I suppose if you want to get into semantics, you could argue a lesbian couple choosing a sperm donor is selecting for whatever genetic traits, but then you might as well argue that straight couples when choosing a spouse are selecting for whatever traits, sounds like a reach to me.

IVF is not a "fast food menu for children". It is a procedure for many women who want children but can't have them the "old fashioned way" used for various reasons, including health reasons (some women for instance don't ovulate normally), lesbian women using donor sperm, etc.

Just to be clear: IVF is not synonymous with "artificial insemination" or insemination through unconventional means. It's not even synonymous with "assisted reproduction technology." IVF is a procedure whereby doctors, scientists and/or lab technicians join egg and sperm in a lab dish, then grow the zygotes into blastocysts and embryos in the lab. Hence, IVF used to be known as "test tube babies." If viable embryos are created, the embryos created in the lab are implanted inside a woman in hopes that one (or more) will implant and she will become pregnant as a result. In IVF, additional embryos are frozen and stored for future use, often many years later.

IVF is not automatically necessary for lesbians or anyone else using donor sperm. IVF is only for women with specific infertility issues.

A great many women who use donor sperm do not use IVF. Same goes for women who use sperm contributed by their partners but for various reasons needs some kind of assistance. Instead, fertilization is attempted and occurs within these women's bodies by using a syringe or pipette to introduce the sperm into the women's vaginas - and then nature is allowed to run its course by letting the sperm swim towards the Fallopian tubes in the normal way as happens in "natural insemination." Intra-vaginal artificial insemination can be done by a doctor or medical technician, or it can be done at home in DIY fashion.

Alternatively, some women who use artificial insemination will have the sperm introduced into their uterus with medical assistance in a process whereby a thin pipette or needle is put through the cervix known as IUI (intra-uterine insemination). Only some women who get pregnant by "artificial insemination" use IVF.