No. We can scan twins/multiple pregnancies within the scan time that you choose however, please consider, that twins/multiple pregnancies tend to be quite close together and therefore more difficult to scan. And they may not both/all be facing upwards also so it takes time to get pictures of both/all faces.
We would recommend that you take our 30 minute scan if you’re carrying more than one baby during your pregnancy but this, of course, is up to you.