While there is not an official "Pause" or "Hold" option, you can "Skip" orders, and change your shipping dates as you see fit, for each product. You can push your next order date as far back as you would like, even 60 days or more, for example.
Once you log into your account, click Manage Subscriptions. You'll then want to click Your Active Subscriptions to view your products and change your ship date(s). After clicking Update, your changes will be saved.
If you wish to skip a shipment for any product, simply click on the Skip button underneath each product to make the change (left side).
You can also click on the arrow next to each product itself, and it gives you the option to change your Subscription Frequency and Next Shipment Date.