My husband and I have been trying to conceive for a while now. He's getting completely stressed out when it's time to BD. The last few months I haven't been telling him it's my fertile time and trying to initiate sex (but I think he knows it's my fertile time because he always asks after what the chances are). Our sex life is suffering and he can't stay in the mood during this period (any other time we have no problem). What can I do to de-stress him?