For those making the argument that NFP requires women to abstain when they most desire intercourse, and that this is somehow unfair to women because men have a constant level of interest, isn’t such a system more unfair to men? If men “always” have an interest in intercourse, isn’t it harder for men to abstain potentially many more days a month, where, for reasons perhaps unrelated to fertilty, intercourse is not possible?
for the OP, wondering whether the unitive aspect can be lost when trying to conceive: yes, absolutely. At one time we were having difficulty conceiving, and were at the stage where the reproductive endocrinologist had prescribed a drug to promote (“force”?) ovulation. Then we had to have relations within such and such time, and then my bride had to get to the dr.'s office within so many hours, the shots gave her headaches and IIRC cysts, and on and on. It was not unitive in any normal sense of the word, so we stopped. We would never have done IVF, BTW, so it was, for my bride, a big step to stop.
@loveslife: can you paraphrase the Catholic objection to contraception? From your posts I do not think you understand it.