Healthcare providers

Reporting fetal sex

From as early as 10 weeks, your patient can request the Illumiscreen NIPS to learn the sex of the fetus. It is important to inform your patients that all other chromosomes will also be screened, and the results will be provided in the report.

The sex of the fetus will always be included in the report whether the patient chooses this option or not, however, it is between you and your patient whether this information is disclosed to them or not.

Male sex is reported as an XY pair of sex chromosomes, and female sex is reported as an XX pair of sex chromosomes.
This result will provide the sex chromosome information for single pregnancies.

If it is a twin pregnancy, the report will indicate if there is a Y chromosome present. The presence of a Y chromosome suggests at least one twin is male, whereas the absence of a Y chromosome suggests neither twin is male.

Illumiscreen will also screen for sex aneuploidies including:

  • Turner syndrome (only one X chromosome in a female)
  • Klinefelter syndrome (an extra X chromosome in a male)
  • Other possible conditions that can be detected are Triple X and Jacobs syndrome.

Single or twin pregnancies

Illumiscreen is validated to analyse single and twin pregnancies. For twin pregnancies, only the presence of the Y chromosome is reported.