I have done this twice, first time I transferred the credits, second time I kept them. It all balances out by year end anyway. If you keep the credits you get them back when you return to work (and so have higher pay for the first month or two), which I preferred.
The only reason I would transfer, is so your husband has additional income while you have none coming in or, as its the last 2 months of the year, to ensure your p60s are straightforward.