How soon can you find out the sex of the baby: the most reliable methods

1. Legal and ethical restrictions on choosing the sex of a child
2. Other methods of determining the sex of the child during IVF and natural pregnancy: when you can find out the sex of the child in the UK, USA, Ukraine and other countries
3. Ultrasound diagnostics (ultrasound) – determines the sex of the baby from 14 weeks with an accuracy of 98%
4. Chorionic villi biopsy (CVS) – determines the sex of the baby at 12 weeks with 100% accuracy
5. Amniocentesis determines the sex of the baby between 15-20 weeks of pregnancy with 100% accuracy

You will find out not only the sex of the baby, but also the likelihood of chromosomal abnormalities. The method is absolutely safe for the child and requires only a blood test of the mother

If you participate in a surrogacy program in Europe, the United States or other countries where this assisted reproductive technology (ART) is allowed, then we are not talking about how many weeks of pregnancy it is possible to find out the sex of the child. You can find out whether a boy or a girl is carried  by your surrogate mother with 100% accuracy already on the 5th day of embryo creation using preimplantation genetic diagnosis (PGD).

Important clarification: PGD is intended for the diagnosis of chromosomal abnormalities of the embryo (preimplantation genetic testing for aneuploidity, PGT-A), as well as hereditary diseases (preimplantation genetic testing for monogenic diseases, PGT-M) linked to sex. For example, hemophilia, Duchenne muscular dystrophy and others. Sex determination with PGD is aimed at choosing a healthy embryo to transfer into the uterine cavity and give birth to a healthy baby.

Legal and ethical restrictions on choosing the sex of a child

In 2026, the legislation and ethical standards of most countries where surrogacy is allowed for individual parents and married couples prohibit the choice of the sex of the child solely at the request of the future parents a really healthy child without a predisposition to hereditary diseases. The exception is the United States, where the Association for Reproductive Medicine (ASRM) recognizes the existence of ethical risks, but does not call for a complete legislative ban, leaving clinics the right to establish their own policy (Family Balancing).

In countries with a high level of reproductive medicine and a long history of surrogacy and oocyte donation, such as the USA, Canada, Ukraine, they put the health of your child in the first place, and gender selection is offered as an additional option.

How it works for Feskov Human Reproduction Group:

1. Future parents (at least one) provide their genetic material or resort to partial donation – the clinic has its own huge database of sperm donors and oocyte donors of any phenotype.

1. Embryologists create embryos and use PGD to examine them for all kinds of chromosome aberrations (PGT-A) and predisposition to hereditary diseases (PGT- M), also determining their sex. Thus, the answer to the question "When will you find out the sex of your baby?" is on the 5th day of the development of your embryos.
2. From among the examined embryos, which guarantee you the birth of a healthy child, you can choose which sex of the embryo you want to transfer to the surrogate mother. Important note: the only restriction when choosing a gender is medical indications. If you are carriers of genes for sex-linked hereditary diseases, we will recommend an embryo XX (girl) or XY (boy) for transfer so that your child is born healthy.

In these three points, Feskov Human Reproduction Group complies with  the legislation of Ukraine, which allows sex selection for medical reasons, adheres to European ethical standards and fulfills your wishes to become the parents of a healthy daughter or son.

Other methods of determining the sex of the child during IVF and natural pregnancy: when you can find out the sex of the child in the UK, USA, Ukraine and other countries

The methods for determining the sex of a child listed at the beginning are the most reliable, allowing you to understand how soon you can find out the sex of the child. But not the only ones. In 2026, the following are also available and used:

• ultrasound diagnostics (ultrasound);
• chorionic villus sampling (CVS);
• amniocentesis.

These methods have been scientifically proven to be effective, but their reliability is lower than that of NIPT and sex determination using PGD.

Home testing kits are also popular. They are advertised in the spirit of "the earliest time you can find out the sex of the baby in the UK (any other country where they are sold – 8 weeks of pregnancy and 99% accuracy". In fact, this is just marketing: there is no scientific confirmation of such properties. And the method itself is quite doubtful: you need to send a sample of your blood to a laboratory recommended by the manufacturer of the test. they are looking for the male Y chromosome. If it is detected, you will have a boy, if not, you will have a girl.

The results of home testing are conjectural because many factors can make reliability questionable. This method is more of an entertaining nature at the level of folk beliefs (preferences of a pregnant woman in food, the position and shape of the abdomen, allegedly indicating that a girl or a boy is to be born).

Let's consider methods with a high degree of reliability.

Ultrasound diagnostics (ultrasound) – determines the sex of the baby from 14 weeks with an accuracy of 98%

The "gold" standard for determining sex combined with the assessment of fetal development. The terms when you can find out the sex of the baby in the UK and any other country are standard – 14 weeks of pregnancy. However, most often, the doctor prescribes a second ultrasound screening at 18-21 weeks of pregnancy in order to more accurately determine the compliance of the fetal development with the norm established for this period. If you wish, you can ask your doctor not to reveal the secret. 

The method is completely safe for the fetus, 100% accuracy is not guaranteed (95-99%). Surely many have heard about cases when the baby did not turn his face to the ultrasound sensor, keeping his gender a secret)

Chorionic villi biopsy (CVS) – determines the sex of the baby at 12 weeks with 100% accuracy

Chorionic villus sampling (CVS) is one of the genetic tests for determining the full range of fetal chromosomal abnormalities, as well as most known monogenic diseases at 10-12 weeks of pregnancy.

How it works: the doctor, under the control of an ultrasound machine, takes a tiny sample of chorionic tissue (chorionic villi, future placenta), genetically identical to the fetus.

It is an accurate but invasive test with little risk of cramping, bleeding, amniotic fluid rupture, miscarriage and preterm birth (0.5-1%).

Amniocentesis determines the sex of the baby between 15-20 weeks of pregnancy with 100% accuracy

Amniocentesis is an invasive diagnostic procedure that allows you to detect almost all known chromosomal abnormalities and many genetic diseases with an accuracy of 98-100% between 15 and 20 weeks of pregnancy. From the fetal cells contained in the amniotic fluid, sex can also be determined with an accuracy of 100%. It is prescribed most often in cases of hereditary burden in the family of future parents.

How it works: A doctor takes a small sample of amniotic fluid under ultrasound guidance for genetic, biochemical, and infectious analysis.

Due to its invasiveness, the method also has a low risk of infections, premature rupture of amniotic fluid and miscarriage (0.1-0.5%).

For convenience, we summarize all the data on when you can find out the sex of a child in the UK and other countries in 2026:

If you are preparing for the IVF program with surrogacy at Feskov Human Reproduction Group, you are not afraid of any risks. Feskov Human Reproduction Group is the best reproductive clinic that guarantees an unlimited number of IVF and the birth of a healthy child of the desired sex under a fixed-price contract.

Our guaranteed surrogacy programs at a fixed price are completed only after the birth of a healthy child of the chosen sex without risks with 100% accurate sex determination even before the embryo transfer. Get a free individual legal roadmap for the birth of your child – contact the manager on the website!