Can you choose your baby's eye color with IVF?

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No, standard in vitro fertilization (IVF) and routine preimplantation genetic testing (PGT) do not allow you to choose a child's eye color or other cosmetic traits.

How Genetic Testing Works in IVF

  • Health Focus: Routine genetic screening (like PGT-A or PGT-M) is used strictly to check embryos for chromosomal abnormalities and prevent serious inherited medical conditions, such as cystic fibrosis or Down syndrome.
  • Inheritance: Physical characteristics like eye color, height, and hair texture are inherited naturally from the parents' combined DNA rather than selected.

Rare Exceptions and Emerging Claims

  • Isolated Providers: A small number of specialized clinics, such as The Fertility Institutes, claim to offer eye color screening as an experimental add-on service alongside gender selection, though it requires specific parental genetic markers.
  • Broader Consensus: The overwhelming consensus across mainstream reproductive medicine and ethics boards is that aesthetic trait selection is not a standard, accepted, or widely available practice.

What is the rarest baby eye color?

Green and gray are the rarest natural eye colors for babies and people overall, appearing in roughly 2% or less of the global population.

Rarity Breakdown

  • Green Eyes: Found in only about 2% of people worldwide. They are extremely uncommon in newborns and develop later as melanin production changes.
  • Gray Eyes: Estimated at under 1% of the population, though they are frequently misidentified or grouped with blue eyes in surveys.
  • Red, Pink, or Violet Eyes: Extremely rare (affecting less than 1% of people) and typically associated with albinism, where a lack of pigment allows light to reflect off blood vessels.

Why Baby Eye Color Changes

  • Melanin Production: Eye color depends on melanin levels in the iris. Babies often start with lighter or medium shades (like blue, gray, or light brown) because pigment-producing cells have not fully activated.
  • Maturation Timeline: Most babies' permanent eye color is established by the time they reach one to two years of age as melanin accumulates.

Do IVF babies look different?

No, IVF babies do not look different from naturally conceived babies and share the same physical features inherited from their biological parents.

Genetics and Appearance

  • Inherited traits: An IVF baby receives DNA from the egg and sperm, meaning they resemble their biological parents or donors just like any other child.
  • No distinct look: Despite internet trends or myths discussing an "IVF look", science shows it is impossible to identify how a person was conceived by looking at their face or body.

Health and Growth

  • Development: Growth milestones, health outcomes, and cognitive development follow the exact same patterns as natural conception.
  • The process: In vitro fertilization only changes how the initial embryo is created in a lab; once implanted, the pregnancy proceeds identically.

Can you customize your baby with IVF?

You cannot fully customize a baby like a retail product using standard In Vitro Fertilization (IVF), but you can screen and select embryos for specific genetic traits.

What You Can Choose or Screen For

  • Sex Selection: Fertility doctors can use Preimplantation Genetic Testing (PGT-A or PGD) during IVF to identify whether an embryo is male or female.
  • Disease Prevention: Doctors can screen embryos to avoid passing on single-gene disorders like cystic fibrosis or chromosomal abnormalities.
  • Polygenic Risk Scoring: Some modern genomic companies sequence embryo DNA to estimate risks for common conditions like heart disease or certain cancers, allowing parents to pick the healthiest embryo.

What You Cannot Do

  • Cosmetic Customization: You cannot custom-order physical traits like specific eye color, hair color, or height. Most traits depend on complex combinations of multiple genes and environmental factors.
  • Direct Genetic Modification: Gene-editing tools like CRISPR are heavily restricted or banned for routine clinical use in human embryos because they are not yet considered safe or effective for designing traits. Opinions on Reddit's ScienceBasedParenting show a clear scientific consensus that selecting traits via cosmetic genetic engineering is not a viable reality today.

Can you control your baby's eye color?

A baby's eye color changes naturally on its own over time, but you cannot manually change or alter a child's eye color after birth.

How Eye Color Develops Naturally

  • Low pigment at birth: Babies, especially those of European descent, are often born with light blue or gray eyes because cells called melanocytes have not yet produced much melanin (pigment).
  • Exposure to light: Natural light exposure stimulates these cells to produce more melanin as the baby grows.
  • Timeline for changes: Lighter eyes frequently darken into green, hazel, or brown between 6 months and 1 year of age, and studies show eye color can continue to shift until a child is about 6 years old.

Genetics and Selection

  • Genetics determine the outcome: Eye color is a complex trait controlled by multiple genes, meaning the final color is set by biology and family genetics rather than outside influence.
  • Reproductive technology: While some specialized fertility clinics offer genetic screening and embryo selection during IVF procedures for specific traits under certain frameworks, there is no safe or approved medical procedure to alter a baby's eye color once they are born.

Choose the skin color, eye color & get a designer baby with PGD treatment

9 related questions found

What are the 3 rarest eye colors?

Excluding medical conditions, the three rarest natural eye colors in the human population are green (about 2%), gray (about 3%), and amber or hazel (about 5%). If you include extremely uncommon medical conditions like albinism and genetic variations, red, violet, and heterochromia are even rarer at less than 1%.

The Top 3 Standard Rare Eye Colors

  • Green (approx. 2% of the world): Green eyes get their shade from a low level of melanin combined with a yellowish pigment called lipochrome. Light scatters off this mix to create a green appearance. They are most common in Northern and Central Europe.
  • Gray (approx. 3% of the world): Gray eyes feature extra collagen fibers in the front layer of the eye. This scatter effect mutes the color into a smoky or silvery hue.
  • Amber or Hazel (approx. 5% of the world): Amber eyes have a solid golden, yellow, or copper tint driven by a pigment called pheomelanin. Hazel eyes blend brown, green, and gold, often shifting colors depending on the light.

Extremely Rare Variations (<1%)

  • Red, Pink, or Violet: Found primarily in people with severe forms of albinism. Because the iris lacks pigment entirely, light reflects off the blood vessels at the back of the eye, making the eyes look pink, red, or deep violet. You can read more about these pigment differences from medical overviews like Verywell Health.
  • Heterochromia: A rare condition where a person has two different colored eyes (complete) or multiple colors within a single iris (partial or central).

What is the least pretty eye color?

Beauty in eye color is completely subjective, but some public surveys rank brown eyes as the least attractive or least preferred simply because they are the most common.

Why Brown Eyes Rank Lowest in Surveys

  • Commonality: Roughly 70% to 80% of the global population has brown eyes. Because people often view rare traits as more exotic or striking, the most common color sometimes scores lower in popularity polls.
  • Survey Results: In studies like those cited by MindBodyGreen and Verywell Health, respondents frequently rank lighter colors like green, blue, or hazel at the top for perceived attractiveness, leaving brown at the bottom.

Why Eye Attractiveness Varies

  • Overall Features: Facial structure, skin tone, and hair color play a massive role in how striking an eye color appears.
  • Lighting and Depth: Dark brown eyes can look black in dim light or reveal warm, golden flecks in bright sunlight, giving them a rich depth that static surveys miss.

What gender are most IVF babies?

Most babies born through standard in vitro fertilization (IVF) are male, making up about 53% to 56% of these births.

Why IVF Skews Male

Research discussed by STAT News shows that fertility treatments can slightly favor boys. Experts point to a few reasons for this pattern:

  • Faster Growth: Male embryos often grow a little faster in the lab than female embryos.
  • Embryo Selection: Doctors look for the healthiest and fastest-growing embryos to transfer. As noted by The Persistent, grading systems may accidentally give higher scores to these faster-developing male embryos.

How Techniques Change the Ratio

The exact gender split depends on the specific method used during the procedure:

  • Standard IVF: Results in a higher percentage of boys (around 53% to 56%).
  • Blastocyst Transfers: Transferring embryos after five days of growth shows a stronger lean toward male births.
  • ICSI (Intracytoplasmic Sperm Injection): This process injects a single sperm directly into an egg. It results in a more balanced gender split, or slightly more girls, closer to 49% to 50% boys.
  • Genetic Testing (PGT): If parents use testing to screen for health or choose a specific gender, the numbers change based on their direct choice.

Are IVF babies technically twins?

No, IVF babies are not technically twins unless they are born from the same pregnancy, but siblings from the same egg-retrieval batch can sometimes be colloquially called "twins born years apart".

When IVF Babies Are Twins

  • Same Pregnancy: If two embryos are transferred at the same time and both implant, or if a single transferred embryo splits into two (identical twins), they are real twins born together.
  • Shared Batch: Siblings created during the same lab cycle but frozen and implanted in separate years share the same genetic "batch," leading some families to view them as delayed twins.

Why They Are Regular Siblings

  • Different Timelines: Medical definitions require twins to share a single pregnancy and birth.
  • Development: Children born years apart grow up with different age gaps, milestones, and distinct environments, making them regular siblings.

What does God say about IVF babies?

The Bible does not mention in vitro fertilization (IVF) by name, but Christian traditions apply broader biblical principles of life, creation, and family to evaluate it.

Value of the Child

  • Children as Blessings: Scripture consistently views children as gifts and blessings from God (Psalm 127:3).
  • Created in God's Image: Christian leaders and theologians widely agree that every child conceived through IVF is fully human, made in God's image, possessing an inherent dignity, and loved by God.
  • God as Creator: Passages like Psalm 139:13–14 state that God knits people together in the womb, meaning that regardless of the medical setting of conception, any life that comes into existence is formed and sustained by God.

Ethical and Moral Views

While the existence of the child is welcomed, Christian denominations hold different views on the process of IVF:

  • The Catholic Perspective: The Roman Catholic Church teaches that IVF is morally wrong. Official documents like Donum Vitae state that the process separates the marital act (sex) from the creation of life, and that creating multiple embryos—which are then frozen, researched, or discarded—violates human dignity because life begins at conception.
  • The Protestant and Evangelical Perspective: Views among Protestants are mixed. Some Christians oppose traditional IVF for the same reasons as the Catholic Church—specifically regarding the fate of unused embryos. Others believe IVF can be morally acceptable for married couples struggling with infertility, provided that the medical process avoids creating extra embryos that would be frozen or destroyed (such as fertilizing only one or two eggs at a time).