SJS,
I’m sorry if I wasn’t clear. I didn’t mean to say that natural family planning is against halacha, and I never asked a rav about this. I just meant that practically speaking, if one is using natural family planning as the only method of preventing pregnancy, it seems to me that this would be a difficult method to use while keeping the halachos of taharas hamishpacha.
For those who maintain that any form of birth control is prohibited when used for childbirth spacing, what about mothers nursing their babies? Generally speaking, mothers who nurse their babies for a year or two (as recommended in the
Torah) are less likely to become pregnant for several months to a year after giving birth than those who don’t.