Is there any way to influence a baby's sex?
Answer From Yvonne Butler Tobah, M.D.
The short answer is no — there's not much the average couple can do to affect a baby's sex.
While old wives' tales suggest that a woman's diet or sexual position during conception can affect a baby's sex, these theories remain unproved. Likewise, researchers have found that timing sex in relation to ovulation — such as having sex days before ovulation to conceive a boy or closer to ovulation to conceive a girl — doesn't work.
Rarely, couples face the agonizing problem of knowing they could pass a genetic trait to a child of a specific sex — usually a boy. Under those special circumstances couples might use high-tech interventions to influence the chance of conceiving a girl. For example:
- Preimplantation genetic screening. With this technique — which is used in combination with in vitro fertilization — embryos are tested for specific genetic conditions and sex before they're placed in a woman's uterus.
- Sperm sorting. Various sperm-sorting techniques — which require artificial insemination or in vitro fertilization — can be used to reduce the likelihood of passing on a genetic condition, as well as select a child's sex.
These procedures are not recommended for choosing a baby's sex for nonmedical reasons. If you have concerns about passing on a genetic condition to your baby, talk to your health care provider.
Yvonne Butler Tobah, M.D.
May 17, 2018
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- Ethics Committee of the American Society for Reproductive Medicine. Use of reproductive technology for sex selection for nonmedical reasons. Fertility & Sterility. 2015;103:1418.
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