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For Debate
Sex selection: the case for
There is a strong argument in favour of sex selection, based on respect
for procreative autonomy -- the autonomy of couples to decide for
themselves how to procreate, and what children to have. Objections
based on possible harm to the child, the parents, or society, are not
compelling, particularly in Australia.
Julian Savulescu
MJA 1999; 171: 373-375
Introduction -
Inconsistency -
Harm -
Procreative autonomy -
Playing God -
Conclusion -
Acknowledgements -
References -
Authors' details
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Introduction |
Various methods now exist for attempting to choose to have a baby of a
desired sex (see Box). With the recent advent of flow cytometric
separation of X and Y sperm and preimplantation genetic diagnosis
(PGD) (see Box), couples no longer have to employ abortion to select
sex. Sex selection may therefore become more acceptable to some
couples, and requests for clinics to provide it may become more
common. In Australia, requests for medically assisted sex selection
are not common; for example, one in-vitro fertilisation (IVF) clinic
in Australia receives about 15-20 requests for sex selection each
year (L Wilton, Consultant, Melbourne IVF, personal
communication).
Medically assisted sex selection for non-medical reasons is banned
in the United Kingdom and Canada.7 In Australia, sex selection
employing artificial insemination or IVF is banned explicitly in
Victoria by section 50 of the Infertility Treatment Act 1995.
In South Australia, section 13 of the Reproductive Technology Act
1988 requires that artificial fertilisation only be used for the
treatment of infertility. Both Acts provide exceptions to avoid the
risk of transmission of a genetic defect (assisted reproduction for
medical reasons).
In Australia, IVF clinics now offer PGD. One centre performs sex
selection for non-medical reasons using IVF and PGD. This has been
provided for fertile couples, but has been fully funded privately,
costing couples around $10 000. So far, two boys and two girls have been
born after sex selection for non-medical reasons (R Jansen, Medical
Director, Sydney IVF, personal communication). In Victoria and
South Australia, where it is illegal to perform PGD for sex selection,
PGD to exclude aneuploidy may reveal the sex of embryos. Couples might
in the future request "healthy" embryos of a desired sex --
"incidental sex selection". The legality of transferring embryos of
a desired sex in this circumstance is not clear.
Although many jurisdictions ban sex selection for non-medical
reasons, there are a number of arguments in favour of allowing it.
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Inconsistency |
Paradoxically, it is legal to attempt periconceptual sex selection
by "natural" means, even if these employ technology developed
specifically for that purpose.7 Prenatal testing and
termination of undesired-sex pregnancies is also accepted practice
in some centres. It is inconsistent to provide couples with
information from prenatal testing which allows them to select sex and
not allow them to select sex by means which are more acceptable to them.
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Harm |
Harm to the child: The mutagenic risks of the sex
selection procedure to children born must be evaluated.8 Many of the
methods use well established procedures (such as IVF), though the
long term consequences of some are not certain: these include PGD,
intracytoplasmic sperm injection,9,10 and
cryopreservation.11,12 Despite encouraging
data from animal studies and existing human experience,13 there is a
theoretical mutagenic risk associated with ultraviolet light and
bisbenzimide used in sperm separation. Concerns about these risks
should be addressed by scientific investigation and by ensuring that
consent is properly informed, not by banning the procedure.
Sex selection might also cause psychological harm if the procedure
does not produce a child of the desired sex. However, parents
inevitably have hopes and expectations for their children which are
deflated every day. Most parents come to accept and love the child they
have, even if that child has a serious disease or disability. Some
parents want their children to be great musicians. Sometimes this
desire becomes overbearing, as depicted in the film Shine.
But the answer is not to ban music schools. The solution is to help
parents to be more tolerant and accepting.
Sex selection may be beneficial to the child born if parents will treat
a child of that sex more favourably. However, it might be argued that
the desire to select sex itself reflects a dysfunctional psychology.
Furthermore, sex selection may allow people who are "unsuitable" to
be parents to believe that they could cope with a child of a particular
sex. It is dangerous to make such judgements about the "suitability"
and the "functionality" of people as parents in the absence of any good
evidence -- society is now rightly loath to enquire into people's
fitness to parent. Moreover, preventing sex selection is no
guarantee that such people, even if dysfunctional, will not have
children.
One objection in bioethics is that sex selection represents a
violation of Kant's dictum never to use a person as a means, but always
to treat him or her as an end. According to this argument, by selecting
sex parents use their child to fulfil their own desires and fail to
respect the child as a person. In one way this objection is fanciful.
Parents have many desires related to their children: perhaps to have a
companion, to have a friend to the first child, or to hold a marriage
together. It is unlikely that any parent ever desires a child solely as
an end in itself. Moreover, Kant's dictum is actually never to use a
person solely as a means.14 Provided that parents
love their child as an end in itself, there is no problem with the
child's life also fulfilling some of the parents' desires for their
own lives.
Most importantly, without sex selection, without a unique sperm and
egg uniting, that particular child would not have existed. Even if the
child is disadvantaged psychologically, this is only wrong from the
child's perspective if its life is so bad that it is not worth living. It
is difficult to point to any life which can be judged from the outside to
be not worth living (possible examples might include Lesch-Nyhan or
Sanfilippo syndrome).
Harm to other family members: It is hard to see how sex
selection harms parents if they have a child of the desired sex; they
may even benefit. If a parent will not be able to accept a child of a
certain sex (say, a woman was sexually abused as a child and wants to
have a girl), then it may be better for both parent and child if the
parent selects sex. Another example might be parents who have one
autistic boy. Autism is more common in boys but is not sex
linked.15 Such parents might be
happier with a girl.
Could other siblings of the undesired sex be mistreated? Firstly,
choosing to have a child of a certain sex does not imply that the other
sex is undesired in other children. Secondly, treatment of children
of the other sex will be largely determined by the pre-existing belief
structure of parents.
Social harm: Does sex selection represent a slide to
eugenics and the creation of "designer babies"? We already allow
parents to select the kind of children they have. Parents have
enormous power (often unconscious) in shaping the kind of people
their children become. Parents have the right to choose the
environment according to what they believe is best for their child.
Moreover, they are already allowed to choose what they believe will be
the best children. Parents are allowed to use prenatal testing for
disability -- even repairable disability such as cleft palate --
because they are allowed to decide whether they can accept that child.
If parents can decide whether they can accept a child with cleft
palate, they should be allowed decide whether they can accept a child
of a given sex.
Are women harmed by sex selection? Some critics claim that allowing
sex selection implies that, in general, one sex is superior to the
other16 -- to do so is
sexist.17 According to
Tonti-Filippini, it "devalues girls".2 However, it does not, any
more than choosing to play Australian Rules football rather than
soccer implies the former is "better" in some general sense. Boys and
girls are different, and this difference matters to different
families in different ways.
Sex selection is more likely to harm women in Asia. There, sex
selection is already common. The male-to-female ratio has risen to
close to 1.2 in China18 and some urban parts of
India.19 This situation has
worsened since the advent of prenatal sex determination.8 It was estimated
in 1990 that, globally, there are 100 million women "missing" (died
prematurely) as a result of various forms of
discrimination.20 It has been claimed that
sex selection would "foster the already existing bias against the
female child".8
Yet, even in Asia, it is not clear that sex selection should be
banned.21 Disturbed sex ratios may
not be a bad thing.22 Advantages which have
been postulated include increase in influence of the rarer sex,
reduced population growth and interbreeding of different
populations.23 Most importantly, a false
belief in the inferiority of women is not a product of sex selection --
sex selection is the product of that belief. Education and improving
social and employment arrangements for women are more important in
correcting these false beliefs than preventing sex selection.
Consider an analogous argument: some disability advocates argue
disability is a social construct; the lives of such people are made
worse by the discriminatory attitudes of others.24 They argue
prenatal testing serves to reinforce these attitudes and question
whether it should be available for conditions like spina
bifida.25,26 The community accepts
that parents should be allowed to employ prenatal testing and
selective termination to have a child without a disability, even if
having a child with a disability would improve the plight of the
disabled. By analogy, parents should be able to choose the sex of their
child, even if not being able to choose the sex of their child would
improve the plight of women.
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Procreative autonomy | |
"Procreative autonomy" is the liberty to decide when and how to have
children according to what parents judge is best.14 Parents know
best their own circumstances, and ultimately it is parents who must
live with and make sacrifices for their children. Procreative
autonomy should not be sacrificed to correct social inequality. It is
totalitarian for the State to dictate which children parents should
have and rear.
In the US, 90% of couples wanting sex selection wished to balance sex
within the family. Parents were in their mid thirties, had two or three
children and only wanted one more.1 In both the US and UK, just
over half of couples choose a girl.27,28 Sex selection for
family balancing would prevent, rather than contribute to, a
disturbed sex ratio and harm to women. There is no risk of
psychological harm to anyone with this kind of sex selection.
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Playing God |
Is selecting sex playing God? People have been playing God ever since
they first decided to control which children they would have by
abortion or by contraceptive use or abstinence. The fundamental
question is: to what degree should parents be allowed to decide which
children they will bear?
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Conclusion |
I have considered objections that sex selection might harm the child,
other members of the family or society. Although, in a few cases, these
objections may be valid, none is necessarily compelling in a country
like Australia, where there will not be a systematic bias in favour of
one sex across the whole community. The harm that might arise from sex
selection is not of a degree sufficient to warrant State infringement
of liberty. In my view, legislation in Victoria and South Australia
should be changed to permit sex selection for balancing family sex.
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Acknowledgements | |
The following people are thanked for critical comments on earlier
drafts: Robert Jansen, Leeanda Wilton, Lach De Crespigny, John
Rogers, Agnes Bankier, Mike Parker, Bob Williamson.
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References |
- Fugger EF, Black SH, Keyvanfar K, Schulman JD. Births of normal
daughters after Microsort sperm separation and intrauterine
insemination, in-vitro fertilization, or intracytoplasmic sperm
injection. Hum Reprod 1998; 13: 2367-2370.
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Carter H. Couple buy a baby girl to order. Herald Sun
(Melbourne) 1998; Sept 12: 9.
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Carter H. Pick-the-sex test. Herald Sun (Melbourne) 1999;
May 5: 5.
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Carter H. Baby sex selection method draws fire. Herald Sun
(Melbourne) 1999; Jan 29: 4.
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Carson SA. Sex selection: the ultimate in family planning.
Fertil Steril 1988; 50: 16-19.
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R v Davidson [1969] VR 667, Menhennitt J.
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Jansen RPS. Evidence based ethics and the regulation of
reproduction. Hum Reprod 1998; 9: 2068-2075.
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Benagiano G, Bianchi P. Sex preselection: an aid to couples or a
threat to humanity? Hum Reprod 1999; 14: 868-870.
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te Velde ER, van Baar AL, van Kooij RJ. Concerns about assisted
reproduction. Lancet 1998; 351: 1529-1534.
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Bowen JR, Gibson FL, Leslie GI, Saunders DM. Medical and
developmental outcome at 1 year for children conceived by
intracytoplasmic sperm injection. Lancet 1998; 351:
1529-1534.
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Dulioust E, Toyama K, Busnel MC, et al. Long-term effects of embryo
freezing in mice. Proc Natl Acad Sci USA 1995; 92: 589-593.
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Wennerholm UB, Albertsson WK, Bergh C, et al. Postnatal growth and
health in children born after cryopreservation as embryos.
Lancet 1998; 351: 1085-1090.
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Simpson JL, Carson SA. The reproductive option of sex selection.
Hum Reprod 1999; 14: 870-872.
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Harris J. "Goodbye Dolly?" The ethics of human cloning. J Med
Ethics 1997; 23: 353-360.
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Ralph I. Autism. N Engl J Med 1997; 337: 97-104.
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President's Commission for the Study of Ethical Problems in
Medicine and Biomedical and Behavioral Research. Screening and
counselling for genetic conditions. Washington, DC: US Government
Printing Office, 1983; 58-59.
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Wertz DC, Fletcher JC. Ethics and human genetics: a cross cultural
perspective. Heidelberg: Springer-Verlag, 1989.
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Zeng Y, Tu P, Gu BC, et al. Causes and implications of the recent
increase in the reported sex ratios at birth in China. Pop Dev Rev
1993; 19: 283-302.
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Registrar General of India. Census of India 1991. Final
population totals. Series I. India, Paper 2. New Delhi: Registrar
General and Census Commissioner, 1992.
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Sen A. More than 100 million women are missing. New York Review
of Books 1990; Dec 20; 61.
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Young R. The ethics of selecting for fetal sex. Ballieres Clin
Obstet and Gynaecol 1991; 5: 576-590.
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Singer P, Wells D. The reproduction revolution. Oxford: Oxford
University Press, 1984; 171.
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Sureau G. Gender selection: a crime against humanity or the
exercise of a fundamental right? Hum Reprod 1999; 14:
867-868.
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Newell C. The social nature of disability, disease and genetics.
J Med Ethics 1999; 25: 172-175.
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Davis A. From where I sit. London: Triangle, 1989; 19.
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Davis A. Yes, the baby should live. New Scientist 1985; Oct
31: 54.
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Batzofin JH. XY sperm separation for sex selection.
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609-618.
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Lui P, Rose GA. Social aspects of over 800 couples coming forward
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| | Authors' details |
Royal Children's Hospital, Melbourne, VIC.
Julian Savulescu, MB BS, PhD, Director, Ethics Unit, Murdoch
Institute, and Director, Ethics Program, Centre for the Study of
Health and Society, University of Melbourne.
Reprints will not be available from the author. Correspondence:
Associate Professor J Savulescu, Murdoch Institute, Royal
Children's Hospital and Centre for the Study of Health and Society,
University of Melbourne, Parkville, VIC 3052.
savulesjATcryptic.rch.unimelb.edu.au
©MJA 1999
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Methods of sex selection
Preconceptual
The most reliable preconceptual method of sex selection is flow cytometric separation of X and Y sperm.1 This technique provides couples with a five- to six-times greater chance of having a girl rather than a boy.1 It is about 85% effective at producing a girl, and 65% effective in producing a boy. One child was born using this method in Sydney,2 but it is no longer employed (R Jansen, Medical Director, Sydney IVF, personal communication).
Periconceptual
Periconceptual choice of sex is based on the observation that conception close to ovulation is more likely to result in a boy. Attempts to predict the time of ovulation have been made by measuring hormonal levels,3 polarity of the egg membrane,4 and cervical mucus thickness. Other "folk" methods include positioning during intercourse, vaginal douching,
and so on.5 These methods are commonly employed throughout the world, but the effectiveness of periconceptual methods has not been well documented.
Postconceptual
Postconceptual medically assisted sex selection is possible by in-vitro fertilisation (IVF) and preimplantation genetic diagnosis (PGD), or by employing prenatal testing (chorionic villus sampling, amniocentesis, ultrasound) and termination of pregnancy, or infanticide.
The most accessible reliable method is chorionic villus sampling (CVS) at about 11 weeks' gestation, followed by abortion if the fetus is not of the desired sex. Although CVS for sex selection is not accepted by any professional body and CVS is not routinely offered for sex selection, some clinicians will provide it; at any rate, couples can access CVS if they are concerned about possible chromosomal abnormalities. In practice, at 11 weeks' gestation couples are free to choose to terminate a pregnancy on any grounds, though legislation in all States imposes some constraints. For example, the Menhennitt ruling in Victoria requires that abortion protect the woman from serious danger
to her life or health.6
Preimplantation genetic diagnosis (PGD) provides an alternative which does not require abortion. It requires IVF and intracytoplasmic sperm injection. Embryo biopsy, removing one or two cells, is performed on
Day 3 at the 8-cell stage. PGD can be used to detect chromosomal abnormalities (by fluorescence in situ hybridisation [FISH]) and single gene disorders such
as cystic fibrosis or haemophilia (by DNA probe or polymerase chain reaction amplification of specific DNA sequences). In Australia, there are two FISH kits currently in use: one tests for chromosomes 13, 16, 18, 21, 22 and the other for 13, 18, 21, X and Y. FISH can thus be used for embryo sexing. Testing takes one day.
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