Yes, you can put an unborn child in a will. In most states, a child who is in gestation when you die is treated as already living for inheritance purposes, as long as the child is later born alive and survives a short statutory period. The cleanest way to do it is not to name the child at all, but to leave property to a group, such as “my children,” so any child born into that group is automatically included.
The Born-Alive Rule and the 120-Hour Window
The legal principle is old, but modern probate codes have made it concrete. The Uniform Probate Code, which forms the basis of probate law in a majority of states, treats an individual in gestation at a decedent’s death as living at that time if the individual lives at least 120 hours after birth.
That five-day window is the key threshold. The child must show signs of independent life after birth and survive for at least 120 hours. If clear and convincing evidence cannot establish that the child survived that long, the law treats the child as having predeceased the parent, and any gift meant for the child fails. Some states use their own survivorship periods that differ from the UPC standard, so the exact number of hours in your state may vary. The underlying rule is the same everywhere: the child has to be born alive to inherit.
Using a Class Gift to Cover a Child on the Way
The most practical way to include an unborn child is through a class gift. Instead of naming individuals, you leave property to a group defined by relationship. A will might say, “I leave my estate in equal shares to my children who survive me.” That single sentence sweeps in every child you have at the time of your death, including one still in gestation who is later born alive.
Class gifts stay current without any effort on your part. If you have one child when you sign the will and three by the time you die, all three share equally. You don’t go back and add names. The class stays open until your death, and anyone who qualifies as a member at that point is included. Under the UPC’s class gift rules, a child in gestation is treated as living at the relevant distribution date as long as the child meets the 120-hour survival requirement.
Language matters. “My children” is the most straightforward class designation, but “my descendants” or “my issue” reaches grandchildren and further generations if that’s your intent. An estate planning attorney can help you choose the term that fits your family. The point is that class gifts handle unknowns gracefully, and that makes them the standard approach when you’re expecting or plan to have more children.
Naming the Unborn Child Directly
You can also identify an unborn child in the will itself. The language might read, “I leave $50,000 to the child my wife, Jane Doe, is currently carrying.” This works when you want a specific amount or asset to go to that particular child, separate from what other beneficiaries receive.
The tradeoff is rigidity. If Jane delivers twins, the language may create confusion about whether the gift was meant for one child or both. If the pregnancy doesn’t result in a live birth, the gift fails. And unlike a class gift, this language doesn’t automatically cover any future children born after the will is signed. You would need to update the will each time. For most families, a class gift paired with specific bequests where needed is the safer structure.
If the Child Is Not Born Alive
When a gift designated for an unborn child who isn’t born alive, the gift fails. In legal terms, this is similar to a “lapsed” bequest, and where the property ends up depends on how the will is written.
If the failed gift was a specific bequest (a named dollar amount or particular asset), it typically falls into the residuary estate, which is everything left over after specific gifts have been distributed and debts paid. Whoever is named in the will’s residuary clause receives that property instead.1Legal Information Institute. Anti-lapse Statute
If the unborn child was part of a class gift, the outcome is simpler. The child is treated as never having been a class member, and the surviving members split the full amount among themselves. Nothing falls through the cracks. That’s another reason class gifts are the preferred approach for expectant parents.
If the residuary clause itself fails because no named beneficiary survives, the property passes under your state’s intestacy laws, which distribute assets to your closest living relatives in a statutory order. A well-drafted will avoids this by naming backup beneficiaries at every level.
What if You Never Update the Will? The Pretermitted Heir Rule
Even if you forget to update your will after a child is born, most states have a backstop called the “pretermitted heir” statute. A pretermitted heir is a child who was born or adopted after the will was signed and who isn’t mentioned anywhere in the document. Legislatures enacted these laws on the assumption that a parent would have included the child if they had gotten around to updating the plan.2Legal Information Institute. Pretermitted Heir
Under the UPC’s version, what the omitted child receives depends on whether the parent had other children when the will was written:
- If there were no existing children at the time the will was signed, the omitted child receives the share they would have gotten if the parent had died without a will, unless the will left substantially everything to the child’s other parent and that parent is still alive.
- If other children existed when the will was signed, the omitted child shares in the portion left to those existing children. The court divides that portion equally among all the children, including the omitted one.
Pretermitted heir protections do not apply in two situations: when the will itself shows the parent intentionally left the child out, or when the parent provided for the child outside the will (through a trust or life insurance, for example) and evidence shows that arrangement was meant to substitute for a will provision.2Legal Information Institute. Pretermitted Heir
Treat these statutes as a safety net, not a plan. Relying on them means a court decides your child’s share instead of you, and litigation over whether the omission was “intentional” can eat into the estate.
Guardianship for an Unborn Child
Inheritance is only half the picture. Your will is also the primary place to name a guardian who would raise your child if both parents die. Without a designation, a court appoints someone based on its own assessment of the child’s best interests, and that person may or may not be who you would have chosen.
You can name a guardian using class-based language just as you would for a bequest. A clause appointing a guardian “for any minor children of mine” covers a child born after the will is signed, including one in gestation at your death. Name an alternate as well, in case your first choice can’t serve when the time comes.
A guardian designation is a strong recommendation to the court, not an absolute guarantee. Courts retain authority to act in the child’s best interests, but they follow the parent’s stated preference in the vast majority of cases.
Managing the Money With a Testamentary Trust
Leaving money directly to a minor creates a practical problem: minors can’t legally manage property. Without a plan, a court appoints a property guardian or conservator to handle the assets until the child turns 18, with ongoing court oversight and expense.
A testamentary trust solves this. Written into the will itself, it is created and funded only after your death, using assets that pass through probate. You name a trustee to manage the funds for your child’s benefit, specify what the money can be used for (education, healthcare, living expenses), and set the age at which the child receives the remaining balance outright. Many parents stagger distributions, such as half at 25 and the rest at 30.
Testamentary trusts pair well with class gifts. You can leave your estate “in equal shares to my children” and direct that any share going to a child under a certain age be held in trust. That covers both existing and future children without naming anyone specifically.
Life Insurance and Retirement Accounts Are Separate
A will only governs assets that pass through probate. Life insurance proceeds, retirement accounts, and jointly held property transfer through their own beneficiary designations or ownership rules, bypassing the will entirely.
You generally cannot name an unborn child individually as a life insurance beneficiary, but you can use group language similar to a class gift. Designating “children of my marriage to [spouse’s name]” includes any child born into that group after the designation is signed. Your insurance company can confirm the exact phrasing they accept. You can also name a trust as the beneficiary and direct the trustee to manage the proceeds for all your children.
Retirement accounts like 401(k)s and IRAs follow their own beneficiary designation forms, not your will. If your spouse is the primary beneficiary, make sure the contingent line also covers future children.
Posthumously Conceived Children Are a Different Rule
Children conceived after a parent’s death using frozen genetic material are a separate legal category from children in gestation at death. The Uniform Probate Code treats a posthumously conceived child as living at the deceased parent’s death for inheritance purposes only if the pregnancy begins within 36 months of the parent’s death (or the child is born within 45 months) and the child survives at least 120 hours after birth.
Not every state has adopted these provisions, and the rules vary more widely than they do for children already in gestation. If you are storing genetic material and want a future child to inherit, your will should address this scenario explicitly. A class gift to “my children” may or may not include a posthumously conceived child depending on how your state reads the language, so spelling out your intent removes the ambiguity.
When to Update the Will
A class gift protects against the most common gap, but it doesn’t handle everything on its own. After a child is born, review the will to confirm the guardian designation, adjust any trust provisions, and make sure the overall distribution still reflects what you want now that your family has grown.
Small changes can sometimes be handled through a codicil, a short legal amendment to the existing will. For anything more significant, drafting a new will is cleaner and less likely to create conflicting instructions. Either way, the process is far less expensive than the probate litigation that can follow an outdated estate plan.