Designer babies come in many shapes and sizes, each brought about for wholly different purposes. Most of the reasons currently is due to save another person's life, be it creating a baby that has the right cells or a matching kidney. However, it seems that humans are now getting more presumptuous by playing God. Take the sex of the baby for example. By natural reproduction, parents could not choose their infant's sex and thus embrace their child for who they truly are. But by being able to choose a new life's sex at will, it is evident that humans are getting above themselves by attempting to control the way of nature at such a big level.
Roman Catholicism and Christianity are one of the many religions in which the start of a human life is a touchy subject. Is it considered a human life the moment the sperm fertilises the egg? Or is it when the heart starts beating? Either way, both religions object against designer babies as it goes against their moral values. In the process of experimenting and extracting the "best" genes from embryos, we are looking at lives as though they are nothing but experimental subjects. Even if the ideal babies succeed in being "born", it clashes with the beliefs of most religions. Take this phrase from the bible for example.
‘God breathed into his nostrils the breath of life and man became a living soul’ Genesis 2:7
In other words, children are gifts from God to humans and not commodities for fulfilling our own selfish desires.
Another sensitive topic would be the babies' and our humanity. Take cloning for example. The concept of a designer baby is to have your "ideal" child. So why would cloning be out of the question? This brings about serious debates on moral values as doctors can easily clone another person, even from one who is already dead. It is not exactly it, but quite close to bringing the person back from the dead, even if only in appearance. This behaviour is outrageous and defies the law of nature. The problems that come with cloning are not only that, but also the issue of humanity. In religious values, every human has a soul granted to them by God. By creating lives at our own whim, do the babies created have souls? Are they considered human beings or are just monsters with human form? These are one of the many ethical issues that has been raised over designer babies.
One way to prevent many people from resorting to designer babies is to educate parents. The religious groups can come together and teach parents that letting the baby be who it is is the best gift to oneself. By imparting the "correct" morals, hopefully the desire for a perfect baby can be quenched, even for a bit. However it is a sensitive subject as different religious groups might have a different view on designer babies, and thus there might be even more debates and heated controversies in the future.