Standard Carrier Screening for Males: When Does Your Partner Need Testing?

 

Carrier screening is not just about one person. It helps couples understand whether they have an increased chance of having a child with certain inherited genetic conditions.

One of the most common questions we hear at Lumi Health is: Why is the female partner tested first? 

At Lumi Health, the right pathway depends on which carrier screening test you choose. In this article, we focus on the Standard Bulk Billed Carrier Screening Test. 

Why does Lumi’s Standard Carrier Screening test females first?

Any biological female over the age of 18 who is pregnant or planning for pregnancy is tested first for the three most common genetic conditions in Australia: cystic fibrosis, spinal muscular atrophy and fragile X syndrome.  

Lumi’s Standard Carrier Screening screens for three genes linked to these three conditions by using a cheek swab to collect a DNA sample. 

Females assigned at birth are tested first because of how the three conditions are inherited, and provide the most cost-effective pathway of carrier screening: 

• It is more cost-effective as it aligns with the Medicare-funded standard reproductive carrier screening. Under Medicare, the male reproductive partner is only eligible for Medicare-funded partner testing if the female partner is first found to be a carrier for cystic fibrosis or spinal muscular atrophy. 
• Cystic fibrosis and spinal muscular atrophy can be silently carried, which means it does not affect the female’s own health. If she is screened and not identified as a carrier, partner testing is most often not needed. 
• Whereas Fragile X syndrome is different because it is linked to the X chromosome. As females have two X chromosomes, and males have an X and Y chromosome, the inheritance pattern is different. Testing the woman first gives the most relevant information for this condition.¹

When does the male partner need testing?

With Lumi’s Standard Carrier Screening, the male reproductive partner is tested if their female partner is found to be a carrier for cystic fibrosis or spinal muscular atrophy. If the male partner is tested beforehand, or at the same time under the Standard three condition screening, this will not be covered by Medicare, and an out-of-pocket cost may apply. ²

If the female partner is not identified as a carrier, partner testing is usually not needed. Similarly, if she is a carrier for fragile X syndrome, partner testing is usually not required for fragile X because of the difference in the inheritance pattern.

Can both partners be tested at the same time?

Yes, but there is an out-of-pocket cost. 

You can also choose a different test type, discover Lumi’s Extended and Comprehensive Carrier Screening options designed for couples. Both partners provide a cheek swab each and receive one combined couples report.

Final takeaway

Male partner testing is necessary only when it helps to clarify the couple’s combined reproductive risk.

With Lumi’s Standard Carrier Screening, the female is tested first. The male partner is tested only if needed and will only be Medicare eligible if his partner is first found to be a carrier for cystic fibrosis or spinal muscular atrophy.

If the male partner is tested outside this Medicare pathway for the Standard condition screen, an out-of-pocket cost will apply.

If you are planning a pregnancy or are already pregnant, starting early can make the process much simpler. It gives you more time to fully understand your results, consider your next steps and avoid any delays if partner testing is needed.

Compare Lumi’s carrier screening options.

References

1. The Royal Australian and New Zealand College of Obstetricians and Gynaecologists. Genetic Carrier Screening. C Obs 63. 2024.
2. Medicare Benefits Schedule. PN.7.16 and items 73451 and 73452. Reproductive carrier testing for cystic fibrosis, spinal muscular atrophy and fragile X syndrome.