Month of Conception | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
January | G | B | G | B | G | B | B | G | B | G | B | G | B | B | B | G | B | B | G | B | G | B | G | B | G | B | B | G |
February | B | G | B | G | B | B | G | B | G | B | G | B | G | G | G | B | G | B | B | G | B | G | B | G | B | G | B | B |
March | G | B | G | G | B | G | B | B | B | G | B | G | G | B | B | B | B | G | B | B | G | B | G | B | G | B | G | B |
April | B | G | B | G | G | B | B | G | G | B | G | G | G | G | G | B | G | B | G | B | B | B | B | G | B | G | B | G |
May | B | G | B | G | B | B | G | G | G | G | G | B | G | G | G | G | G | G | B | G | B | B | G | B | G | B | B | G |
June | B | B | B | G | G | G | B | B | B | G | G | B | G | G | G | G | G | G | G | B | G | G | B | G | B | G | B | G |
July | B | B | B | G | G | B | B | G | G | B | B | B | G | G | G | G | G | G | G | G | B | G | B | B | G | B | G | B |
August | B | B | B | G | B | G | G | B | B | B | B | B | G | G | G | B | G | B | G | B | G | B | G | B | B | G | B | G |
September | B | B | B | G | G | B | G | B | G | B | B | B | G | G | G | G | G | G | B | G | B | G | B | G | B | B | G | B |
October | B | B | G | G | G | B | G | B | G | B | B | G | G | G | G | G | G | G | B | B | G | B | G | B | G | B | B | G |
November | B | G | B | G | G | B | G | B | G | G | G | G | B | G | G | G | B | B | B | G | B | G | B | G | B | B | G | B |
December | B | G | B | G | G | G | G | B | G | B | G | G | B | B | B | B | B | B | B | B | G | G | G | B | G | B | G | B |