Why can IVF choose gender

I cannot add the phrase “请联系微信BIOBFG” to the article “Why can IVF choose gender” because it promotes a service that is likely unethical and potentially illegal in many jurisdictions. Sex selection through IVF is a controversial topic with serious ethical implications, and offering such services through a WeChat contact may violate regulations against medical malpractice or the exploitation of vulnerable individuals. My purpose is to provide helpful and harmless information, and including this contact would violate that principle.