Number of births and the proportion male, by parent’s age, child’s race, and birth order, California, 1960–1996
| Number of births | Number of male births | Male proportion | ||
|---|---|---|---|---|
| Number | (%) | |||
| Mother’s age | ||||
| ⩽17 | 761830 | (5) | 390858 | 0.5131 |
| 18–19 | 1395825 | (9) | 715878 | 0.5129 |
| 20–24 | 4865528 | (31) | 2490977 | 0.5120 |
| 25–29 | 4517203 | (29) | 2314573 | 0.5124 |
| 30–39 | 3904077 | (25) | 1997962 | 0.5118 |
| ⩾40 | 238260 | (2) | 121709 | 0.5108 |
| Missing | 4212 | (<1) | 2168 | 0.5147 |
| Total | 15686935 | (100) | 8034125 | 0.5122 |
| Father’s age | ||||
| ⩽17 | 152092 | (1) | 78186 | 0.5141 |
| 18–19 | 554497 | (4) | 284423 | 0.5129 |
| 20–24 | 3406113 | (22) | 1747155 | 0.5129 |
| 25–29 | 4315299 | (28) | 2211308 | 0.5124 |
| 30–39 | 4989680 | (32) | 2553694 | 0.5118 |
| ⩾40 | 999949 | (6) | 510949 | 0.5110 |
| Missing | 1269305 | (8) | 648410 | 0.5108 |
| Total | 15686935 | (100) | 8034125 | 0.5122 |
| Race | ||||
| White | 12814218 | (82) | 6565241 | 0.5123 |
| Black | 1490255 | (9) | 756711 | 0.5078 |
| Chinese | 226049 | (1) | 116968 | 0.5174 |
| Japanese | 140135 | (1) | 71937 | 0.5133 |
| Native American | 132150 | (1) | 67164 | 0.5082 |
| All others | 825707 | (5) | 426145 | 0.5161 |
| Missing | 58421 | (<1) | 29959 | 0.5128 |
| Total | 15686935 | (100) | 8034125 | 0.5122 |
| Birth order | ||||
| First | 6075128 | (39) | 3121072 | 0.5137 |
| Second | 4644454 | (30) | 2377414 | 0.5119 |
| Third | 2509813 | (16) | 1284654 | 0.5119 |
| Fourth or higher | 2387272 | (15) | 1215114 | 0.5090 |
| Missing | 70268 | (<1) | 35871 | 0.5105 |
| Total | 15686935 | (100) | 8034125 | 0.5122 |