It wasn’t an injury or illness or contract dispute that scratched Laura Sanko from Invicta FC 6. Instead, a pregnancy has forced the mother-to-be from the July card.

Sanko and Invicta officials recently announced the news.

In her place steps Cassie Robb (0-1), who suffered a submission loss to Sanko (1-0) at Invicta FC 4. She takes on fellow atomweight (115-pounder) Livia Von Plettenberg (1-1) in Invicta FC 6’s opening bout.

Invicta FC 6 takes place July 13 at Ameristar Casino Hotel in Kansas City, Mo. The event streams as an online pay-per-view.

Robb, who made her pro debut following a successful amateur run, kept things competitive with Sanko before succumbing to a second-round rear-naked choke in their January bout. She looks to rebound against Von Plettenberg, an Austrian who drops a weight class following a short-notice decision loss to Joanne Calderwood at Invicta FC 4.

The latest Invicta FC 6 card now includes:

MAIN CARD (Online PPV, 10 p.m. ET)

PRELIMINARY CARD (Online PPV, 8 p.m. ET)

For the latest on Invicta FC 6, check out the MMA Rumors section of the site.

(Pictured: Laura Sanko)