Fetal Sex Determination

How Does the Fetal Sex Determination Test Work?

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At Bioclinic, your trusted laboratory on the Caribbean Coast of Costa Rica, we offer the fetal sex determination test — a non-invasive procedure that can be performed from the 10th week of pregnancy. This test uses a simple maternal blood sample to detect cell-free fetal DNA, providing safe and reliable results in approximately two weeks.

The test is based on a standard blood draw from the mother — no fasting or special preparation is needed. Using real-time PCR (polymerase chain reaction), we analyze the sample for the presence of the Y chromosome. If it’s detected, the baby is male; if not, the baby is female. The technology allows results with over 99% accuracy in single pregnancies from the 12th week onward.

Benefits of the Test

• Results in around two weeks — perfect for early planning of clothes, names, nursery themes, or simply enjoying the anticipation.
• Completely non-invasive — safe for both mother and baby.
• High accuracy — especially in single pregnancies.

When Should I Take the Test?

It is recommended from week 12 of pregnancy. For multiple pregnancies, accuracy may decrease. At Bioclinic, we offer this test at our locations in Puerto Viejo de Talamanca and Limón Centro, with trained professionals ensuring a comfortable and secure experience.

What to Expect

1. Book an appointment by phone or visit one of our locations.
2. Blood is drawn via a standard venipuncture.
3. The sample is analyzed using advanced real-time PCR methods in our certified lab.
4. You’ll receive your results within approximately two weeks, by phone or email.

An Emotional and Practical Advantage

Knowing your baby’s sex early can help you connect emotionally and plan ahead with clarity. From name selection to creating a special way to share the news with loved ones — this test brings joy and peace of mind to many expectant parents.

Conclusion
Fetal sex determination is a safe, reliable, and exciting way to bond with your baby early in your pregnancy journey. At Bioclinic, we combine precision, compassion, and innovation to provide you with trustworthy results and a welcoming experience.