The couple should not expect or allow a third party, not even a physician, to determine what they will do. It is a private decision.
مَعَ ذٰلِكَ ،‏ تُظْهِرُ أَدِلَّةٌ عِلْمِيَّةٌ أَنَّ ٱلْحَمْلَ نَادِرًا مَا يَحْصُلُ عِنْدَ ٱسْتِعْمَالِهِمَا بِسَبَبِ طُرُقِ عَمَلِهِمَا ٱلَّتِي نَاقَشْنَاهَا .‏