To find the gender prediction, find the mother's age at conception (across the top of the table) and then the month in which conception occurred (Left of table). Follow the column and row to the intersecting point.

Blue = Boy and Pink = Girl

Woman's Age at Conception
Month of Conception	18	19	20	21	22	23	24	25	26	27	28	29	30	31
January
February
March
April
May
June
July
August
September
October
November
December

Woman's Age at Conception
Month of Conception	32	33	34	35	36	37	38	39	40	41	42	43	44	45
January
February
March
April
May
June
July
August
September
October
November
December