Are there any conditions at all that allow a married Catholic couple to use contraceptives?

Don't laugh at me, but I heard that some conditions are as follows: 1. Soldier coming back from years of serving has only one night to spend with spouse 2. Couple has at least a certain number of children and cannot afford anymore. 3. Couple would not be able to conceive even if they did not use contraceptives for example, woman's time of month, infertility or such situations. not that there's any good reason to do it other than hypothetical inquiry Really Catholic. I heard those from people who are either Catholic or know people who are.