HELLO, IF VIT D IS DECREASE AS YOU ARE IN FERTILE AGE, YOUR ISSUES ALSO ARE DEFICIENCY OF VITAMIN D3. YOU CAN SUBSTITUTE FROM OUTSIDE TABLET VITAMIN D3 60, 000 I.U ONE PER WEEK FOR EIGHT WEEKS. THAN ONE EVERY MONTH. B12 DEFICIT MAY LEAD TO IMPROPER DEVELOPMENT OF EMBRIYO, N MALFORMED  ISSUE. INJECTION VITAMIN B12 IS AVAILABLE BUT MUST BE TESTED BEFORE INJECTING. AFTER A COURSE OF FIVE ADD CAPSULE BECOSUL-Z ONE AT NIGHT FOR LONG PERIODS. SEVEN SEAS COD LIVER OIL PEARLS (MERCK)ONE PER DAY FOR LONG-TERM BASIS. SO ASTO PREVENT OSTEOARTHRITIS THAT LEADS TO OSTEOPOROSIS. I HOPE YOU CAN UNDERSTAND. O.K, BYE.